Back to top

AGREEMENT AND PLAN OF MERGER

Agreement and Plan of Merger

AGREEMENT AND PLAN OF MERGER | Document Parties: RAVEN BIOTECHNOLOGIES, INC | TLW MERGER SUB, INC | TLW, LLC | VAXGEN, INC You are currently viewing:
This Agreement and Plan of Merger involves

RAVEN BIOTECHNOLOGIES, INC | TLW MERGER SUB, INC | TLW, LLC | VAXGEN, INC

. RealDealDocs™ contains millions of easily searchable legal documents and clauses from top law firms. Search for free - click here.
Title: AGREEMENT AND PLAN OF MERGER
Governing Law: Delaware     Date: 11/13/2007
Industry: Biotechnology and Drugs     Law Firm: Cooley Godward;Latham Watkins     Sector: Healthcare

AGREEMENT AND PLAN OF MERGER, Parties: raven biotechnologies  inc , tlw merger sub  inc , tlw  llc , vaxgen  inc
50 of the Top 250 law firms use our Products every day

 

 

Exhibit 2.1

 

 

 

AGREEMENT AND PLAN OF MERGER

BY AND AMONG

VAXGEN, INC.,

TLW MERGER SUB, INC.,

TLW, LLC,

AND

RAVEN BIOTECHNOLOGIES, INC.

 

Dated as of November 12, 2007

<PAGE>

TABLE OF CONTENTS

Page

----

ARTICLE 1 THE TRANSACTION......................................................2

1.1 The Transaction...................................................2

1.2 Effective Time....................................................2

1.3 Effect of Merger I................................................3

1.4 Certificate Of Incorporation; Bylaws; Certificate

of Formation; Operating Agreement.................................3

1.5 Directors and Officers of Surviving Corporation;

Board of Managers of Surviving Entity and Parent..................3

1.6 Effect on Capital Stock...........................................3

1.7 Escrow............................................................7

1.8 Exchange of Certificates..........................................9

1.9 Stock Transfer Books.............................................11

1.10 No Further Ownership Rights in Raven Stock.......................11

1.11 Lost, Stolen or Destroyed Certificates...........................11

1.12 Tax Consequences.................................................11

1.13 Taking of Necessary Action; Further Action.......................11

1.14 Effect of Merger II..............................................12

1.15 Material Adverse Effect..........................................12

ARTICLE 2 REPRESENTATIONS AND WARRANTIES OF RAVEN.............................13

2.1 Organization of Raven............................................13

2.2 Capital Structure................................................13

2.3 Obligations with Respect to Capital Stock........................14

2.4 Authority........................................................14

2.5 Section 203 of the Delaware General Corporation

Law Not Applicable...............................................15

2.6 Raven Financial Statements.......................................16

2.7 Absence of Certain Changes or Events.............................16

2.8 Taxes............................................................16

2.9 Intellectual Property............................................18

2.10 Compliance; Permits; Restrictions................................21

2.11 Litigation.......................................................23

2.12 Brokers' and Finders' Fees.......................................23

2.13 Employee Benefit Plans...........................................23

2.14 Absence of Liens and Encumbrances; Condition

of Equipment.....................................................27

2.15 Environmental Matters............................................27

2.16 Labor Matters....................................................28

2.17 Agreements, Contracts and Commitments............................29

 

i

<PAGE>

 

2.18 Reorganization Matters...........................................30

2.19 Registration Statement; Proxy Statement..........................31

2.20 Board Approval...................................................31

2.21 Books and Records................................................31

2.22 Real Property Leases.............................................31

2.23 Insurance........................................................32

2.24 Accounts Receivable..............................................32

2.25 Certain Business Practices.......................................33

2.26 Suppliers........................................................33

2.27 Government Contracts.............................................33

2.28 Interested Party Transactions....................................33

2.29 Warrants and Indemnity Agreements................................33

ARTICLE 3 REPRESENTATIONS AND WARRANTIES OF PARENT AND

MERGER SUBS...................................................................33

3.1 Organization of Parent; Merger Subs..............................34

3.2 Authority........................................................34

3.3 Section 203 Of The Delaware General Corporation

Law Not Applicable...............................................35

3.4 Board Approval...................................................35

3.5 SEC Filings; Financial Statements................................35

3.6 Capital Structure................................................36

3.7 Obligations With Respect To Capital Stock........................37

3.8 Cash on Hand and No Undisclosed Liabilities......................37

3.9 Absence of Certain Changes or Events.............................37

3.10 Taxes............................................................37

3.11 Intellectual Property............................................39

3.12 Compliance; Permits; Restrictions................................40

3.13 Litigation.......................................................40

3.14 Brokers' and Finders' Fees.......................................40

3.15 Employee Benefit Plans...........................................40

3.16 Environmental Matters............................................44

3.17 Labor Matters....................................................45

3.18 Reorganization Matters...........................................45

3.19 Registration Statement; Proxy Statement/Prospectus...............47

3.20 Fairness Opinion and Board Approval..............................47

3.21 Restrictions on Business Activities..............................47

3.22 Government Contracts.............................................47

3.23 Interested Party Transactions....................................47

3.24 Books and Records................................................47

3.25 Real Property Leases.............................................48

3.26 Insurance........................................................48

3.27 Absence of Liens and Encumbrances; Condition of

Equipment........................................................49

3.28 Agreements, Contracts and Commitments............................49

ARTICLE 4 CONDUCT OF BUSINESS PENDING THE TRANSACTION.........................50

ii

<PAGE>

4.1 Conduct of Business..............................................50

ARTICLE 5 ADDITIONAL AGREEMENTS...............................................52

5.1 Proxy Statement/Prospectus; Registration Statement;

Other............................................................52

5.2 Stockholder Approvals............................................53

5.3 Access to Information; Confidentiality...........................54

5.4 Consents; Approvals..............................................54

5.5 Bridge Loan......................................................54

5.6 Employee Matters.................................................54

5.7 Director Indemnification and Insurance...........................56

5.8 Notification of Certain Matters..................................57

5.9 Monthly Financial Statements.....................................57

5.10 Further Action...................................................58

5.11 Public Announcements.............................................58

5.12 Listing of Parent Common Stock...................................58

5.13 Tax-Free Reorganization..........................................58

5.14 Board of Directors of Parent.....................................58

5.15 No Solicitation..................................................59

5.16 Tax Matters......................................................64

5.17 Intentionally Omitted............................................64

5.18 Consultation Regarding Certain Closing Conditions................64

ARTICLE 6 CONDITIONS TO THE TRANSACTION.......................................64

6.1 Conditions to Obligation of Each Party to Effect

Merger I.........................................................64

6.2 Additional Conditions to Obligations of Parent...................65

6.3 Additional Conditions to Obligations of Raven....................66

ARTICLE 7 TERMINATION.........................................................67

7.1 Termination......................................................67

7.2 Notice of Termination; Effect of Termination.....................69

7.3 Termination Fees.................................................69

7.4 Fees and Expenses................................................70

ARTICLE 8 INDEMNIFICATION.....................................................70

8.1 Definitions......................................................70

8.2 Indemnification and Escrow Fund..................................71

8.3 Limitations on Indemnification...................................71

8.4 Assertion of Claims..............................................71

8.5 Notice and Defense of Third Party Claims.........................72

8.6 Survival of Representations and Warranties.......................72

ARTICLE 9 GENERAL PROVISIONS..................................................73

9.1 Notices..........................................................73

iii

<PAGE>

9.2 Certain Definitions..............................................74

9.3 Definitions List.................................................74

9.4 Amendment........................................................81

9.5 Waiver...........................................................81

9.6 Headings.........................................................81

9.7 Severability.....................................................81

9.8 Entire Agreement.................................................81

9.9 Assignment.......................................................82

9.10 Parties in Interest..............................................82

9.11 Failure or Indulgence Not Waiver; Remedies.......................82

9.12 Governing Law....................................................82

9.13 Counterparts.....................................................82

Exhibit A Form of Voting Agreement

Exhibit B Form of Lock-Up Agreement

Exhibit C [Reserved]

Exhibit D Form of Escrow Agreement

Exhibit E Bridge Loan Documents

Exhibit F Certificate of Formation

Exhibit G Operating Agreement

 

iv

<PAGE>

AGREEMENT AND PLAN OF MERGER

AGREEMENT AND PLAN OF MERGER, dated as of November 12, 2007 (the

"Agreement"), among VAXGEN, INC., a Delaware corporation ("Parent"), TLW MERGER

SUB, INC., a newly-formed Delaware corporation wholly-owned by Parent ("Merger

Sub I"), TLW, LLC, a newly-formed Delaware limited liability company

wholly-owned by Parent ("Merger Sub II" and together with Merger Sub I, the

"Merger Subs"), and RAVEN BIOTECHNOLOGIES, INC., a Delaware corporation

("Raven").

RECITALS

WHEREAS, the Boards of Directors of Parent and Raven have each determined

that it is advisable and in the best interests of their respective stockholders

for Parent to enter into a business combination with Raven upon the terms and

subject to the conditions set forth herein.

WHEREAS, upon the terms and subject to the terms and conditions of this

Agreement, Parent, Merger Subs and Raven intend to effect (i) a merger of Merger

Sub I with and into Raven with Raven as the surviving corporation ("Merger I")

in accordance with the applicable provisions of the Delaware General Corporation

Law ("Delaware Law"), and (ii) immediately following the effectiveness of Merger

I, a merger of Raven with and into Merger Sub II in accordance with the

applicable provisions of Delaware Law and the Delaware Limited Liability Company

Act ("DLLCA") ("Merger II" and, together with Merger I, the "Transaction"). Upon

consummation of the Transaction, Raven will cease to exist and Merger Sub II

will succeed to all of Raven's business, assets and liabilities.

WHEREAS, Parent, Merger Subs and Raven intend that Merger I and Merger II

shall be treated as an integrated transaction and that the Transaction shall

qualify as a reorganization within the meaning of Section 368(a) of the Internal

Revenue Code of 1986, as amended (the "Code") and the regulations promulgated

thereunder (the "Treasury Regulations").

WHEREAS, in connection with Merger I, each outstanding share of Raven

Series D Preferred Stock, $0.001 per share (the "Raven Series D Preferred

Stock") shall be converted into the right to receive the Merger Consideration,

upon the terms and subject to the conditions set forth herein; and each

outstanding share of Raven capital stock other than Raven Series D Preferred

Stock shall be cancelled and shall receive no Merger Consideration.

WHEREAS, as a condition to the willingness of, and an inducement to Parent

to enter into this Agreement, contemporaneously with the execution and delivery

of this Agreement, each Raven stockholder listed on Schedule A attached hereto

(each, a "Major Raven Stockholder") is entering into a voting agreement in

substantially the form of Exhibit A attached hereto (the "Voting Agreements"),

and each Major Raven Stockholder and Raven Affiliate listed on Schedule B

attached hereto and each Parent Affiliate listed on Schedule B is entering into

a lock-up agreement in substantially the form of Exhibit B attached hereto (the

"Lock-Up Agreements"), under which such stockholder will agree not to sell 100%

of the shares of Parent Common Stock he, she or it holds immediately following

Merger I for a period of six months following the Effective Time of Merger I.

1

<PAGE>

WHEREAS, Parent, Merger Subs and Raven desire to make certain

representations and warranties and other agreements in connection with the

Transaction.

AGREEMENT

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants

and agreements herein contained, Parent, Merger Subs and Raven hereby agree as

follows:

ARTICLE 1

THE TRANSACTION

1.1 The Transaction.

(a) Effective Time. At the Effective Time of Merger I (as defined in

Section 1.2), and subject to and upon the terms and conditions of this Agreement

and Delaware Law, Merger Sub I shall be merged with and into Raven, and the

separate corporate existence of Merger Sub I shall cease. Raven shall continue

as the surviving corporation in Merger I ("Surviving Corporation I").

Immediately following the Effective Time of Merger I, and upon the terms and

subject to the conditions set forth in this Agreement, and in accordance with

Delaware Law, Surviving Corporation I will be merged with and into Merger Sub

II, and the separate existence of Surviving Corporation I shall cease. Merger

Sub II shall continue as the surviving entity in Merger II (the "Surviving

Entity") and shall succeed to and assume all the rights and obligations of Raven

in accordance with Delaware Law.

(b) Closing. Unless this Agreement shall have been terminated and

the transactions herein contemplated shall have been abandoned pursuant to

Section 7.1, and subject to the satisfaction or waiver of the conditions set

forth in Article VI (other than those conditions that by their nature are to be

satisfied at the Closing, but subject to the satisfaction or waiver of such

conditions), the consummation of the Transaction will take place as promptly as

practicable (and in any event within two business days) after satisfaction or

waiver of the conditions set forth in Article VI, at the offices of Cooley

Godward Kronish LLP, 3175 Hanover Street, Palo Alto, CA 94304-1130, unless

another date, time or place is agreed to in writing by the parties hereto.

1.2 Effective Time. Upon the terms and subject to the provisions of this

Agreement, the Agreement of Merger for Merger I, satisfying the applicable

requirements of Delaware Law (the "Agreement of Merger"), and such other

certificates, satisfying the applicable requirements of Delaware Law, as are

required under Delaware Law, shall be duly executed by Raven and Merger Sub I

and concurrently with the Closing filed with the Secretary of State of the State

of Delaware in accordance with the relevant provisions of Delaware Law (the time

of such filing with the Secretary of State of the State of Delaware (or such

later time as may be agreed in writing by the parties hereto and specified in

the Agreement of Merger) being the "Effective Time of Merger I"). Upon the terms

and subject to the provisions of this Agreement, the Agreement of Merger for

Merger II, satisfying the applicable requirements of Delaware Law and the DLLCA

(the "Second Agreement of Merger"), and such other certificates, satisfying the

applicable requirements of Delaware Law and the DLLCA, as are required under

Delaware Law and DLLCA, shall be duly executed by Surviving Corporation I and

Merger Sub II and

2

<PAGE>

concurrently with or as soon as practicable following the Effective Time of

Merger I filed with the Secretary of State of the State of Delaware in

accordance with the relevant provisions of Delaware Law and the DLLCA (the time

of such filing with the Secretary of State of the State of Delaware (or such

later time as may be agreed in writing by the parties hereto and specified in

the Second Agreement of Merger) being the "Effective Time of Merger II").

1.3 Effect of Merger I. The effect of Merger I shall be as provided in

this Agreement and the applicable provisions of Delaware Law and the DLLCA.

Without limiting the generality of the foregoing, and subject thereto, at the

Effective Time of Merger I all the property, rights, privileges, powers and

franchises of Raven shall vest in Surviving Corporation I, and all debts,

liabilities, obligations and duties of Raven shall become the debts,

liabilities, obligations and duties of Surviving Corporation I.

1.4 Certificate Of Incorporation; Bylaws; Certificate of Formation;

Operating Agreement.

 

(a) Certificate of Incorporation. The Certificate of Incorporation of

Merger Sub I, as in effect immediately prior to the Effective Time of Merger I,

shall be the Certificate of Incorporation of Surviving Corporation I until

thereafter amended as provided by Delaware Law and such Certificate of

Incorporation.

(b) Bylaws. The Bylaws of Merger Sub I, as in effect immediately

prior to the Effective Time of Merger I, shall be the Bylaws of Surviving

Corporation I until thereafter amended as provided by Delaware Law, the

Certificate of Incorporation of Surviving Corporation I and such Bylaws.

(c) Certificate of Formation. The Certificate of Formation of the

Surviving Entity immediately after the Effective Time of Merger II shall be in a

form attached as Exhibit F attached hereto.

(d) Operating Agreement. The Operating Agreement of the Surviving

Entity immediately after the Effective Time of Merger II shall be in a form

attached as Exhibit G attached hereto.

1.5 Directors and Officers of Surviving Corporation; Board of Managers of

Surviving Entity and Parent. As of the Effective Time of Merger I, the initial

directors of Surviving Corporation I shall be as set forth on Schedule 1.5, each

to hold office in accordance with the Certificate of Incorporation and Bylaws of

Surviving Corporation I, and the initial officers of Surviving Corporation I

shall be as set forth on Schedule 1.5, in each case until their respective

successors are duly elected or appointed and qualified. The Board of Managers of

the Surviving Entity immediately after the Effective Time of Merger II shall be

the respective individuals who are directors of Surviving Corporation I

immediately prior to the Effective Time of Merger II. The directors and officers

of Parent as of the Effective Time of Merger I shall be as provided in Section

5.14 below.

1.6 Effect on Capital Stock. Upon the terms and subject to the conditions

set forth in this Agreement, at the Effective Time of Merger I, by virtue of

Merger I and without any action on the part of Parent, Merger Sub, Raven or the

holders of any of the following securities:

3

<PAGE>

(a) Conversion of Securities.

(i) Raven Series D Preferred Stock.

(1) In accordance with the terms of the Restated Certificate

of Incorporation of Raven, each holder of shares of Raven Series D Preferred

Stock issued and outstanding immediately prior to the Effective Time of Merger I

shall be entitled to receive, prior and in preference to any holder of Raven

Series A Preferred Stock, Raven Series B Preferred Stock, Raven Series C

Preferred Stock or Raven Common Stock, an amount equal to two times (2X) the

Original Issue Price of the Raven Series D Preferred Stock, plus any declared

but unpaid dividends (the "Series D Preference Amount"), unless the amount

distributable to the holders of Series D Preferred Stock shall be insufficient

to permit the payment to such holders of the full Series D Preference Amount, in

which case the entire amount legally available for distribution shall be

distributed ratably among the holders of the Raven Series D Preferred Stock in

proportion to the Series D Preferred Amount each such holder is otherwise

entitled to receive. Each share of Raven Series D Preferred Stock issued and

outstanding immediately prior to the Effective Time of Merger I (excluding any

shares to be canceled pursuant to Section 1.6(b)) shall be canceled and

extinguished and automatically converted, subject to Section 1.6(i), into the

right to receive (i) 0.171284 share(s) (the "Exchange Ratio") of validly issued,

fully paid and nonassessable shares of common stock of Parent, $0.01 par value

per share ("Parent Common Stock"), subject to adjustment as set forth in this

Agreement (the "Initial Merger Consideration"), and cash in lieu of any

fractional shares of Parent Common Stock to be issued or paid in consideration

therefor, and (ii) the right to receive a pro rata share of any release of

shares of Parent Common Stock held in the Escrow Fund to the holders of Raven

Series D Preferred Stock receiving Merger Consideration (the "Raven

Stockholders") in accordance with Section 8.2 and the Escrow Agreement.

(2) Notwithstanding the foregoing, the number of Parent

Common Shares to be issued to the Raven Stockholders is subject to the following

adjustments: (i) If, on the date that is no later than fourteen (14) days prior

to the estimated date of the Effective Time of Merger I, the total amount of

cash, cash equivalents and marketable securities held by Parent, plus the amount

of outstanding indebtedness of Raven to Parent under the Bridge Loan (such total

being the "Actual Cash Balance") is less than Guaranteed Closing Cash Balance,

as defined below, then the number of shares of Parent Common Stock to be issued

to the Raven Stockholders as provided in Section 1.6(a)(i)(1) above shall be

increased by an amount equal to the quotient obtained by dividing (A) the amount

by which the Actual Cash Balance is less than the Guaranteed Closing Cash

Balance by (B) the Parent Share Value; provided that in no event shall any

increase to the number of shares of Parent Common Stock to be issued to the

Raven Stockholders result in the number of shares of Parent Common Stock

issuable to Raven Stockholders in Merger I representing more than 49.99% of the

number of shares of Parent Common Stock outstanding as of immediately prior to

the Effective Time of Merger I; (ii) if, immediately prior to the Effective Time

of Merger I, the fees, expenses, liabilities and obligations incurred by Raven

in connection with the transactions contemplated by this Agreement, including

without limitation those owing to current and former Raven employees, directors

and consultants relating to retention, severance and bonuses payable as of the

Closing pursuant to agreements between Raven and such Raven employees, directors

and consultants, and required to be paid in cash exceeds the amount of cash held

by Raven (other

4

<PAGE>

than cash provided under the Bridge Loan Agreement between Raven and Parent)

immediately prior to the Effective Time of Merger I (such deficiency being a

"Cash Deficiency Amount"), then the number of shares of Parent Common Stock to

be issued to the Raven Stockholders as provided in Section 1.6(a)(i)(1) above

shall be decreased by an amount equal to the quotient obtained by dividing (A)

the Cash Deficiency Amount by (B) the Parent Share Value; and (iii) if, on the

date that is three days after the Parent Stockholders meeting at which Merger I

is approved, the full amount of the "Commitments" under that certain Note

Purchase Agreement dated November 12, 2007 by and among Raven and the parties

thereto ("Note Purchase Agreement") has not been funded and received by Raven in

accordance with the terms thereof, then the Exchange Ratio to be used on Section

1.6(a)(i)(1) shall be changed to 0.07569. For purposes of this agreement,

"Guaranteed Closing Cash Balance" shall be $64,000,000 if the Effective Time of

Merger I occurs on or before March 31, 2008. Should the Effective Time of Merger

I occur later than March 31, 2008, the Guaranteed Closing Cash Balance shall be

reduced by $50,000 per day. For purposes of this Agreement, "Parent Share Value"

shall mean the average of the last sale prices of the Parent Common Stock quoted

on the "Pink Sheets" for the ten (10) trading days ending on the trading day

immediately preceding the date of this Agreement.

(ii) Other Series of Raven Preferred Stock and Raven Common

Stock. Each share of Raven Series A Preferred Stock, Raven Series B Preferred

Stock, Raven Series C Preferred Stock and Raven Common Stock issued and

outstanding immediately prior to the Effective Time of Merger I shall, by virtue

of Merger I, be canceled and extinguished without any conversion thereof and

without payment of any consideration therefor and cease to exist, all in

accordance with the Restated Certificate of Incorporation of Raven as a result

of the allocation of the Merger Consideration to the liquidation preference of

the Series D Preferred Stock as set forth therein.

(b) Cancellation. Each Share held in the treasury of Raven and each

Share owned by Parent or by any direct or indirect wholly owned subsidiary of

Raven or Parent immediately prior to the Effective Time of Merger I shall, by

virtue of Merger I and without any action on the part of the holder thereof,

cease to be outstanding, be canceled and extinguished without any conversion

thereof and without payment of any consideration therefor and cease to exist.

(c) Capital Stock of Merger Sub I. Each share of common stock, par

value $0.001 per share, of Merger Sub I issued and outstanding immediately prior

to the Effective Time of Merger I shall be converted into and exchanged for one

validly issued, fully paid and nonassessable share of common stock, $0.001 par

value per share, of Surviving Corporation I. Each stock certificate of Merger

Sub I evidencing ownership of any such shares shall, as of the Effective Time of

Merger I, evidence ownership of such shares of common stock of Surviving

Corporation I.

(d) Restricted Stock. At the Effective Time of Merger I, those

shares of Raven Common Stock subject to vesting or other restrictions shall

fully vest and any restrictions and rights of repurchase thereon fully lapse.

5

<PAGE>

(e) Warrants. All warrants to purchase Raven Series D Preferred

Stock (the "Series D Warrants") outstanding as of the Effective Time of Merger I

shall be assumed by Parent and shall continue to have, and be subject to, the

same terms and conditions as are in effect immediately prior to the Effective

Time of Merger I, except that such Series D Warrants shall be exercisable for

that number of whole shares of Parent Common Stock equal to the product (rounded

down to the nearest whole number of shares of Parent Common Stock, with no cash

being payable for any fractional share eliminated by such rounding) of (i) the

number of shares of Raven Series D Preferred Stock that were issuable upon

exercise of such Series D Warrant immediately prior to the Effective Time of

Merger I and (ii) the Exchange Ratio, and the per share exercise price of each

such Series D Warrant shall be adjusted by dividing (A) the per share exercise

price of such Series D Warrant immediately prior to the Effective Time of Merger

I by (B) the Exchange Ratio.

(f) Adjustments to Exchange Ratio. The Exchange Ratio shall be

adjusted to reflect fully (i) the effect of any stock split, reverse split,

stock dividend (including any dividend or distribution of securities convertible

into Parent Common Stock or Raven Series D Preferred Stock), reorganization,

recapitalization or other like change with respect to Parent Common Stock or

Raven Series D Preferred Stock occurring after the date hereof and prior to the

Effective Time of Merger I, and (ii) any change in the number of shares of

Series D Preferred Stock outstanding as of immediately prior to the Effective

Time of Merger I from 188,470,593.

(g) Fractional Shares. No fraction of a share of Parent Common Stock

will be issued, but in lieu thereof each holder of Raven Series D Preferred

Stock who would otherwise be entitled to a fraction of a share of Parent Common

Stock (after aggregating all fractional shares of Parent Common Stock to be

received by such holder) shall receive from Parent an amount of cash (rounded to

the nearest whole cent), without interest, equal to the product of (i) such

fraction, multiplied by (ii) the applicable price per share calculated in

accordance with Section 1.6(a).

(h) Dissenting Shares. Any holder of shares of Raven Common Stock or

Raven Preferred Stock issued and outstanding immediately prior to the Effective

Time of Merger I with respect to which dissenters' rights, if any, are available

by reason of Merger I pursuant to Section 262 of Delaware Law and/or Chapter 13

of the California General Corporation Law (the "CGCL") who has not voted in

favor of Merger I or consented thereto in writing and who complies with Section

262 of Delaware Law and/or Chapter 13 of the CGCL ("Dissenting Shares") shall

not be entitled to receive any portion of the Merger Consideration pursuant to

this Article 1, unless such holder fails to perfect, effectively withdraws or

loses its dissenters' rights under Delaware Law and/or the CGCL. Such holder

shall be entitled to receive only such rights as are granted under Section 262

of Delaware Law and/or Chapter 13 of the CGCL. If any such holder fails to

perfect, effectively withdraws or loses such dissenters' rights under Delaware

Law and/or the CGCL, as applicable, such Dissenting Shares shall thereupon be

deemed to have been converted as of the Effective Time of Merger I into the

right to receive the Merger Consideration to which such shares of Raven Common

Stock or Raven Preferred Stock are entitled pursuant to this Article 1, if any,

without interest. Prior to the Effective Time of Merger I, Raven shall not,

except with the prior written consent of Parent, make any payment with respect

to, or settle or offer to settle, any such demands, or agree to do any of the

foregoing. Any payments made with respect to Dissenting Shares shall be made

solely by the Surviving Entity, and no funds or other

6

<PAGE>

property have been or shall be provided by Parent, Merger Sub I or Merger Sub II

for such payment.

1.7 Escrow Escrow.

 

(i) At the Effective Time of Merger I, to provide funds for the

satisfaction of any claims for indemnification made by Parent Indemnified

Persons pursuant to Article 8 of this Agreement, Parent shall deliver 10% of the

shares of Parent Common Stock to which each Raven Stockholder (each, an "Escrow

Participant" and collectively, the "Escrow Participants") is entitled pursuant

to this Article 1 (collectively, the "Escrow Amount") to an escrow account (the

"Escrow Account") to be established by Parent with U.S. Bank (the "Escrow

Agent"), to be held by the Escrow Agent pursuant to the terms of the escrow

agreement set forth as Exhibit D attached hereto (the "Escrow Agreement").

(ii) The certificate representing the Escrow Shares shall be

retained in the Escrow Account until released pursuant to Section 1.7(b) below.

During the period in which the Escrow Amount is retained in the Escrow Account,

the Escrow Amount will be held for the benefit of the registered holders of the

Escrow Amount, and such registered holders shall be entitled to vote the Escrow

Shares and to receive the economic benefit of any dividends paid with respect to

the Escrow Shares as provided in the Escrow Agreement. From and after the

Effective Time of Merger I, unless and until it is determined that a Parent

Indemnified Person is entitled to retain the Escrow Shares in respect of

indemnification claims, the Escrow Shares shall appear as issued and outstanding

on the balance sheet of Parent.

(b) Release of Escrow.

(i) Within five (5) Business Days following the Expiration Date,

in accordance with the terms of the Escrow Agreement, the Escrow Agent shall

distribute to the Escrow Participants, at their respective addresses and in

proportion to their respective Pro Rata Amount set forth on the Closing

Consideration Exhibit to the Escrow Agreement, any Escrow Shares deposited into

the Escrow Account pursuant to this Section 1.7 less (i) the number of Escrow

Shares paid to Parent in satisfaction of indemnification claims made by Parent

prior to the Expiration Date pursuant to Article 8 hereof, and (ii) a number of

Escrow Shares which the Escrow Agent shall retain equal to the aggregate amount

of indemnification claims made by Parent pursuant to Article 8 hereof which

shall be outstanding and unresolved (the "Aggregate Outstanding Claims"), or, in

the event that the Aggregate Outstanding Claims exceed the remaining number of

Escrow Shares, all remaining Escrow Shares (such number of retained Escrow

Shares and such number of retained Escrow Shares as such amount and number may

be further reduced after the Expiration Date by distributions to the Escrow

Participants by Parent pursuant to Article 8 hereof and amounts paid to Parent

in satisfaction of indemnification claims made by Parent prior to the Expiration

Date pursuant to Article 8 hereof, the "Retained Escrow Consideration").

(ii) In the event and to the extent that after the Expiration

Date any outstanding indemnification claim made by a Parent Indemnified Person

pursuant to Article 8 hereof is resolved against such Parent Indemnified Person

(or is resolved in favor of a Parent Indemnified Person but in a smaller amount

than originally retained by the Escrow Agent on

7

<PAGE>

behalf of Parent), the Escrow Agent shall deliver to the Escrow Participants, at

their respective addresses and in proportion to their respective Pro Rata Amount

set forth on the Closing Consideration Exhibit to the Escrow Agreement, an

amount of the Retained Escrow Consideration corresponding to the amount of the

outstanding indemnification claim resolved against such Parent Indemnified

Person (or, in the case where the indemnification claim is resolved in favor of

a Parent Indemnified Person but in a smaller amount than originally retained by

Parent, the difference between the amount resolved in favor of such Parent

Indemnified Person and the amount originally retained), unless the remaining

Aggregate Outstanding Claims would exceed the Retained Escrow Consideration

after such distribution, in which case the Escrow Agent shall retain in the

Escrow Account a number of Escrow Shares equal in value to the amount of the

remaining Aggregate Outstanding Claims.

(c) Escrow Participant Representative.

(i) Shareholder Representative Services, LLC is hereby appointed

and constituted the "Escrow Participant Representative" under this Agreement,

and as such shall serve as agent for and have all powers as attorney-in-fact of

each Escrow Participant, for and on behalf of each Escrow Participant, to take

the following actions in connection with the negotiation, settlement and

compromise of indemnification claims pursuant to Article 8 of this Agreement and

the release of the Escrow Amount in connection therewith: to give and receive

notices of communications; to agree to, negotiate or enter into settlements and

compromises of and comply with orders of courts with respect to any disputes

involving any claims made by Parent Indemnified Persons or the Escrow

Participants under this Agreement; to sign receipts, consents or other documents

to effect any of the transactions contemplated by this Agreement; and to take

all actions necessary or appropriate in the judgment of the Escrow Participant

Representative in connection with the foregoing. In no event shall the consent

of any Escrow Participant be required for the Escrow Participant Representative

to settle or compromise any claim or dispute on behalf of the Escrow

Participants.

(ii) If the Escrow Participant Representative elects to resign

as Escrow Participant Representative for any reason, the Escrow Participant

Representative shall notify Parent of its intent to resign, and Escrow

Participants representing at least a majority of the aggregate Escrow Shares

shall, by written notice to Parent, appoint a successor Escrow Participant

Representative within five (5) Business Days after receiving notice of such

resignation. Escrow Participants representing at least a majority of the

aggregate Escrow Amount may, at any time, by written notice to Parent, appoint a

replacement Escrow Participant Representative.

(iii) Notice or communications to or from the Escrow Participant

Representative pursuant to this Section 1.7 given in accordance with Section 9.1

hereof shall constitute notice to or from each of the Escrow Participants.

(iv) A decision, act, consent or instruction of the Escrow

Participant Representative pursuant to this Section 1.8 shall constitute a

decision, act, consent or instruction of each and all of the Escrow

Participants, and shall be final, binding and conclusive upon each and all of

the Escrow Participants, and Parent shall be entitled to rely upon any decision,

act, consent or instruction of the Escrow Participant Representative as being

the decision, act,

8

<PAGE>

consent or instruction of each and all of the Escrow Participants, and Parent

shall be relieved from any liability to any Person for any acts done by it in

accordance with such decision, act, consent or instruction.

(v) The Escrow Participant Representative shall promptly notify

each Escrow Participant in the event of any decision, act, consent or

instruction of the Escrow Participant Representative pursuant to this Section

1.7(c). Each Escrow Participant, severally in proportion to its respective Pro

Rata Amount and not jointly, with right of contribution among them, shall

indemnify and hold harmless the Escrow Participant Representative with respect

to any claim, loss, damage, cost and liability against such Escrow Participant

Representative, including without limitation reasonable attorneys' fees and

costs, arising from any decision, act, inaction, consent or instruction of such

Escrow Participant Representative pursuant to this Section 1.7(c) from out of

the Escrow Account, unless and to the extent that such claim arises from such

Escrow Participant Representative's gross negligence or willful misconduct. The

Escrow Participant Representative shall not be liable to any Raven Stockholder

for any act done or omitted hereunder as Escrow Participant Representative

except to the extent the Escrow Participant Representative has acted with gross

negligence or willful misconduct.

(vi) The Escrow Participant Representative shall have no duties

or responsibilities except those expressly set forth herein and in the Escrow

Agreement. The Escrow Participant Representative may consult with its own

counsel. Any fees and expenses incurred by the Escrow Participant Representative

shall be reimbursable by the Raven Stockholders through the Escrow Account. The

Escrow Participant Representative may rely on any notice, instruction,

certificate, statement, request, consent, confirmation, agreement or other

instrument which it reasonably believes to be genuine and to have been signed or

presented by a proper Person or Persons.

1.8 Exchange of Certificates.

(a) Exchange Agent. Parent shall supply, or shall cause to be

supplied, to or for the account of a bank or trust company designated by Parent

(the "Exchange Agent"), in trust for the benefit of the holders of Raven Series

D Preferred Stock, for exchange in accordance with this Section 1.8, through the

Exchange Agent, certificates evidencing the Parent Common Stock constituting the

Initial Merger Consideration and issuable pursuant to this Agreement in exchange

for outstanding Shares.

(b) Exchange Procedures. Promptly following the Effective Time of

Merger I, Parent will instruct the Exchange Agent to mail to each holder of

record of a certificate or certificates which immediately prior to the Effective

Time of Merger I evidenced outstanding Shares (the "Certificate(s)") (i) a

letter of transmittal (which shall specify that delivery shall be effected, and

risk of loss and title to the Certificate(s) shall pass, only upon proper

delivery of the Certificate(s) to the Exchange Agent and shall be in such form

and have such other provisions as Parent and Raven may mutually agree) and (ii)

instructions to effect the surrender of the Certificate(s) in exchange for the

certificates evidencing shares of Parent Common Stock and, in lieu of any

fractional shares thereof, cash. The letter of transmittal shall also specify

that the Raven Stockholder, by executing the letter of transmittal and

surrendering the Certificate(s) in connection with Merger I, agrees to the

appointment of the Escrow Participant Representative.

9

<PAGE>

Upon surrender of a Certificate for cancellation to the Exchange Agent together

with such letter of transmittal, duly executed, and such other customary

documents as may be reasonably required pursuant to such instructions, the

holder of such Certificate shall be entitled to receive in exchange therefor (A)

certificate(s) evidencing that number of whole shares of Parent Common Stock

which such holder has the right to receive in accordance with the Exchange Ratio

in respect of the Shares formerly evidenced by such Certificate, if any, (B) any

dividends or other distributions to which such holder is entitled pursuant to

Section 1.6(g), (C) the right to receive a pro rata share of any distribution to

the Raven Stockholders as of the Effective Time of Merger I pursuant to Section

8.2 hereof and the Escrow Agreement, if any, and (D) cash in lieu of fractional

shares of Parent Common Stock to which such holder is entitled pursuant to

Section 1.6(h), if any (the rights to receive such shares of Parent Common

Stock, dividends, distributions and cash described in these clauses (A) through

(D), being, collectively, the "Merger Consideration"), and the Certificate so

surrendered shall forthwith be canceled. In the event of a transfer of ownership

of Shares which is not registered in the transfer records of Raven as of the

Effective Time of Merger I, Parent Common Stock and cash may be issued and paid

in accordance with this Article I to a transferee if the Certificate evidencing

such Shares is presented to the Exchange Agent, accompanied by all documents

required to evidence and effect such transfer pursuant to this Section 1.8(b)

and by evidence that any applicable stock transfer taxes have been paid. Until

so surrendered, each outstanding Certificate that, prior to the Effective Time

of Merger I, represented Shares will be deemed from and after the Effective Time

of Merger I, for all corporate purposes, other than the payment of dividends, to

evidence the right to receive the Merger Consideration.

(c) Distributions with Respect to Unexchanged Shares. No dividends or

other distributions declared or made after the Effective Time of Merger I, with

respect to Parent Common Stock with a record date after the Effective Time of

Merger I, shall be paid to the holder of any unsurrendered Certificate until the

holder of such Certificate shall surrender such Certificate. Subject to

applicable law, following surrender of any such Certificate, there shall be paid

to the record holder of the certificates representing whole shares of Parent

Common Stock issued in exchange therefor, without interest, at the time of such

surrender, the amount of dividends or other distributions with a record date

after the Effective Time of Merger I theretofore paid with respect to such whole

shares of Parent Common Stock.

(d) Transfers of Ownership. If any certificate for shares of Parent

Common Stock is to be issued in a name other than that in which the Certificate

surrendered in exchange therefor is registered, it will be a condition of the

issuance thereof that the Certificate so surrendered will be properly endorsed

and otherwise in proper form for transfer and that the person requesting such

exchange will have paid to Parent or any person designated by it any transfer or

other taxes required by reason of the issuance of a certificate for shares of

Parent Common Stock in any name other than that of the registered holder of the

certificate surrendered, or established to the satisfaction of Parent or any

agent designated by it that such tax has been paid or is not payable.

(e) No Liability. Notwithstanding anything to the contrary in this

Section 1.8, neither Parent nor Raven shall be liable to any holder of Raven

Series D Preferred Stock or Parent Common Stock for any Merger Consideration (or

dividends or distributions with respect

10

<PAGE>

thereto) delivered to a public official pursuant to any applicable abandoned

property, escheat or similar law.

(f) Withholding Rights. Parent, the Surviving Entity and the Exchange

Agent shall be entitled to deduct and withhold from the Merger Consideration

otherwise payable pursuant to this Agreement to any holder of Shares, such

amounts as Parent, the Surviving Entity or the Exchange Agent is required to

deduct and withhold with respect to the making of such payment under the Code or

any provision of state, local, provincial or foreign tax law. To the extent that

amounts are so withheld and remitted to the appropriate Governmental Entity,

such withheld amounts shall be treated for all purposes of this Agreement as

having been paid to the holder of the Shares in respect of which such deduction

and withholding was made by Parent, the Surviving Entity or the Exchange Agent.

1.9 Stock Transfer Books. Subject to Section 1.8(b), at the Effective Time

of Merger I, the stock transfer books of Raven shall be closed, and there shall

be no further registration of transfers of Raven Common Stock or Raven Preferred

Stock thereafter on the records of Raven.

1.10 No Further Ownership Rights in Raven Stock. The Merger Consideration

delivered upon the surrender for exchange of Shares in accordance with the terms

hereof shall be deemed to have been issued in full satisfaction of all rights

pertaining to such Shares, and there shall be no further registration of

transfers on the records of the Surviving Entity of Shares which were

outstanding immediately prior to the Effective Time of Merger I. If, after the

Effective Time of Merger I, Certificates are presented to the Surviving Entity

for any reason, they shall be canceled and exchanged as provided in this Article

I.

1.11 Lost, Stolen or Destroyed Certificates. In the event any Certificates

shall have been lost, stolen or destroyed, the Exchange Agent shall issue in

exchange for such lost, stolen or destroyed Certificates, upon the making of an

affidavit (with indemnity) of that fact by the holder thereof, such shares of

Parent Common Stock and cash in lieu of fractional shares as may be required

pursuant to Section 1.6. The parties shall cooperate and use reasonable efforts

to identify and obtain all Certificates to be exchanged, and to finalize the

letter of transmittal to be provided to the Exchange Agent, prior to the

Effective Time.

1.12 Tax Consequences. It is intended by the parties hereto that Merger I

and Merger II shall be treated as a single integrated transaction and shall

constitute a reorganization within the meaning of Section 368(a) of the Code.

The parties hereto hereby adopt this Agreement as a "plan of reorganization"

within the meaning of Treasury Regulations Sections 1.368-2(g) and 1.368-3(a).

1.13 Taking of Necessary Action; Further Action. Each of Parent and Raven

in good faith will take all such commercially reasonable and lawful action as

may be necessary or appropriate in order to effectuate Merger I in accordance

with this Agreement as promptly as possible. If, at any time after the Effective

Time of Merger I, any such further action is necessary or desirable to carry out

the purposes of this Agreement and to vest the Surviving Entity with full right,

title and possession to all assets, property, rights, privileges, powers and

11

<PAGE>

franchises of Raven, the Board of Managers of the Surviving Entity is fully

authorized in the name of the company or otherwise to take, and will take, all

such lawful and necessary action.

1.14 Effect of Merger II. By virtue of Merger II and without any further

action on the part of Parent, Merger Sub II or Surviving Corporation I, (i) each

membership interest of Merger Sub II outstanding immediately prior to Merger II

shall be unchanged and shall remain issued and outstanding and (ii) each share

of common stock of Surviving Corporation I outstanding prior to Merger II shall

be cancelled without consideration and shall cease to be an outstanding share of

Surviving Corporation I stock.

1.15 Material Adverse Effect.

(a) When used in this Agreement with respect to Raven, the term

"Material Adverse Effect" means any change or effect that, individually or in

the aggregate, is or would reasonably be expected to be, materially adverse to

the business, assets (including intangible assets), condition (financial or

otherwise) or results of operations, taken as a whole, of Raven or on the

ability of Raven to complete the Closing pursuant to the terms hereof and/or

comply with its obligations hereunder, in each case excluding any change or

effect arising from or relating to any action taken by Raven at Parent's written

request; provided, however, that none of the following shall be deemed either

alone or in combination to constitute, and none of the following shall be taken

into account in determining whether there has been or will be, a Material

Adverse Effect with respect to Raven: (i) changes in prevailing economic or

market conditions in the United States, which changes or developments do not

disproportionately affect Raven relative to other participants in the

biotechnology industry in any material respect; (ii) changes or developments in

the biotechnology industry generally, which changes or developments do not

disproportionately affect Raven relative to other participants in the

biotechnology industry in any material respect; (iii) changes or developments in

financial or securities markets or in connection with general economic,

political or regulatory conditions, which changes do not disproportionately

affect Raven in any material respect; (iv) any adverse effect resulting from or

relating to any change in applicable laws or regulations or accounting

requirements or principles; (v) the execution, delivery and performance of this

Agreement or the consummation of the transactions contemplated hereby; or (vi)

hostilities, acts of war, sabotage or terrorism or military actions or any

escalation or material worsening of any such hostilities, acts of war, sabotage

or terrorism or military actions existing or underway as of the date hereof. In

addition, a Raven Material Adverse Effect will not include a loss of employees

that occurs as a result of the announcement of this Agreement or the pendency of

the transactions contemplated in this Agreement that would not reasonably be

expected either to (x) materially delay the development of RAV12, Raven's

pre-clinical drug candidates in development as of the date of this Agreement,

and/or Raven's research and development collaboration activities as of the date

of this Agreement, or (y) to materially impair Raven's ability to develop its

core technologies or intellectual property.

(b) When used in this Agreement with respect to Parent, the term

"Material Adverse Effect" means any change or effect that, individually or in

the aggregate, is or would reasonably be expected to be, materially adverse to

the business, assets (including intangible assets), condition (financial or

otherwise) or results of operations, taken as a whole, of Parent or on the

ability of Parent, as the case may be, to complete the Closing pursuant to the

terms hereof

12

<PAGE>

and/or comply with its obligations hereunder, in each case excluding any change

or effect arising from or relating to any action taken by Parent at Raven's

written request; provided, however, that none of the following shall be deemed

either alone or in combination to constitute, and none of the following shall be

taken into account in determining whether there has been or will be, a Material

Adverse Effect with respect to Parent (i) changes in prevailing economic or

market conditions in the United States, which changes or developments do not

disproportionately affect Parent relative to other participants in the

biotechnology industry in any material respect; (ii) changes or developments in

the biotechnology industry generally, which changes or developments do not

disproportionately affect Parent relative to other participants in the

biotechnology industry in any material respect; (iii) changes or developments in

financial or securities markets or in connection with general economic,

political or regulatory conditions, which changes do not disproportionately

affect Parent in any material respect; (iv) any adverse effect resulting from or

relating to any change in applicable laws or regulations or accounting

requirements or principles; (v) the execution, delivery and performance of this

Agreement or the consummation of the transactions contemplated hereby; or (vi)

hostilities, acts of war, sabotage or terrorism or military actions or any

escalation or material worsening of any such hostilities, acts of war, sabotage

or terrorism or military actions existing or underway as of the date hereof.

ARTICLE 2

REPRESENTATIONS AND WARRANTIES OF RAVEN

Raven hereby represents and warrants to Parent that, except as set forth in the

written disclosure schedule delivered by Raven to Parent (it being understood

that any such exception shall be deemed to qualify the section or subsection of

this Agreement to which it corresponds in number and each other section or

subsection to which the relevance of such disclosure is reasonably apparent on

its face) (the "Raven Disclosure Schedule"):

2.1 Organization of Raven. Each of Raven and its subsidiaries is a

corporation duly organized, validly existing and in good standing under the laws

of the jurisdiction of its incorporation, has all requisite corporate power and

authority to own, lease and operate its property and to carry on its business as

now being conducted and as proposed to be conducted, and is duly qualified to do

business and in good standing as a foreign corporation in each jurisdiction in

which the failure to be so qualified would reasonably be expected to have a

Material Adverse Effect on Raven. Raven has made available to Parent a true and

complete list of all of Raven's subsidiaries, together with the jurisdiction of

incorporation of each subsidiary. Raven made available a true and correct copy

of the Certificate of Incorporation and Bylaws of Raven and similar governing

instruments of each of its subsidiaries, each as amended to date, to counsel for

Parent.

2.2 Capital Structure. The authorized capital stock of Raven consists of

447,000,000 shares of Common Stock, par value $0.001 per share, of which there

are 22,225,614 shares issued and outstanding as of the date of this Agreement

and 254,834,607 shares of Preferred Stock, par value $0.001 per share, of which

2,305,000 shares have been designated Series A Preferred Stock, 12,420,760

shares have been designated Series B Preferred Stock, 51,638,254 shares have

been designated Series C Preferred Stock and 188,470,593 shares have been

designated as Series D Preferred Stock, and 2,305,000 shares of Series A

Preferred Stock,

13

<PAGE>

12,420,760 shares of Series B Preferred Stock, 51,638,254 shares of Series C

Preferred Stock, and 164,599,208 shares of Series D Preferred Stock are issued

and outstanding as of such date. No shares of capital stock are held in Raven's

treasury. All outstanding shares of Raven Common Stock and Raven Preferred Stock

are duly authorized, validly issued, fully paid and non-assessable and are not

subject to preemptive rights created by statute, the Certificate of

Incorporation or Bylaws of Raven or any agreement or document to which Raven is

a party or by which it is bound, and were issued in compliance with all

applicable federal and state securities laws. As of the date hereof, Raven has

reserved an aggregate of 4,636,387 shares of Common Stock, net of exercises, for

issuance to employees, consultants and non-employee directors pursuant to the

Raven Stock Option Plan, under which stock options (the "Raven Options") are

outstanding for an aggregate of 44,123,643 shares. All shares of Raven Common

Stock subject to issuance as aforesaid, upon issuance on the terms and

conditions specified in the instruments pursuant to which they are issuable,

would be duly authorized, validly issued, fully paid and non-assessable. Section

2.2 of the Raven Disclosure Schedule lists each holder of Raven Common Stock and

Raven Preferred Stock, each outstanding option and warrant to acquire shares of

Raven Common Stock or Raven Preferred Stock, as applicable, the name of the

holder of such option or warrant, the number of shares subject to such option or

warrant, the exercise price of such option or warrant, the number of shares as

to which such option or warrant will have vested at such date, the vesting

schedule and termination date of such option or warrant and whether the

exercisability of such option or warrant will be accelerated in any way by the

transactions contemplated by this Agreement or for any other reason, indicating

the extent of acceleration, if any.

2.3 Obligations with Respect to Capital Stock. Except as set forth in

Section 2.3 of the Raven Disclosure Schedule, there are no equity securities of

any class of Raven, or any securities exchangeable or convertible into or

exercisable for such equity securities, authorized, issued, reserved for

issuance or outstanding. Except for securities Raven owns, directly or

indirectly through one or more subsidiaries, there are no equity securities of

any class of any subsidiary of Raven, or any security exchangeable or

convertible into or exercisable for such equity securities, issued, reserved for

issuance or outstanding. Except as set forth in Section 2.3 of the Raven

Disclosure Schedule, there are no options, warrants, equity securities, calls,

rights (including preemptive rights), commitments or agreements of any character

to which Raven or any of its subsidiaries is a party or by which it is bound

obligating Raven or any of its subsidiaries to issue, deliver or sell, or cause

to be issued, delivered or sold, or to repurchase, redeem or otherwise acquire,

or cause the repurchase, redemption or acquisition of, any shares of capital

stock of Raven or any of its subsidiaries or obligating Raven or any of its

subsidiaries to grant, extend, accelerate the vesting of or enter into any such

option, warrant, equity security, call, right, commitment or agreement. Except

as set forth on Section 2.3 of the Raven Disclosure Schedule, there are no

registration rights and, to the knowledge of Raven, there are no voting trusts,

proxies or other agreements or understandings with respect to any equity

security of any class of Raven or with respect to any equity security of any

class of any of its subsidiaries.

2.4 Authority.

(a) Raven has all requisite corporate power and authority to enter

into this Agreement and to consummate the transactions contemplated hereby. The

execution and delivery of this Agreement and the consummation of the

transactions contemplated hereby have

14

<PAGE>

been duly authorized by all necessary corporate action on the part of Raven, and

the filing and recordation of the Certificate of Merger pursuant to Delaware Law

in a form reasonably agreed to by the parties. This Agreement has been duly

executed and delivered by Raven and, assuming the due authorization, execution

and delivery by Parent, constitutes the valid and binding obligation of Raven,

enforceable in accordance with its terms, except as enforceability may be

limited by bankruptcy and other similar laws and general principles of equity.

The execution and delivery of this Agreement by Raven does not, and the

performance of this Agreement will not, (i) conflict with or violate the

Certificate of Incorporation or Bylaws of Raven or the equivalent organizational

documents of any of its subsidiaries, (ii) subject to obtaining the approval of

Raven's stockholders of Merger I as contemplated in Section 5.2 and compliance

with the requirements set forth in Section 2.4(b) below, conflict with or

violate any law, rule, regulation, order, judgment or decree applicable to Raven

or any of its subsidiaries or by which its or any of their respective properties

is bound or affected, or (iii) result in any breach of or constitute a default

(or an event that with notice or lapse of time or both would become a default)

under, or impair Raven's rights or alter the rights of obligations of any third

party under, or give to others any rights of termination, amendment,

acceleration or cancellation of, or result in the creation of a lien or

encumbrance on any of the properties or assets of Raven or any of its

subsidiaries pursuant to, any note, bond, mortgage, indenture, contract,

agreement, lease, license, permit, franchise or other instrument or obligation

to which Raven or any of its subsidiaries is a party or by which Raven or any of

its subsidiaries or its or any of their respective properties are bound or

affected, except to the extent such conflict, violation, breach, default,

impairment or other effect would not, in the case of the provisions of this

clause (iii), reasonably be expected to have a Material Adverse Effect or

prevent or materially delay the consummation of Merger I or other transactions

contemplated by this Agreement. Section 2.4 of the Raven Disclosure Schedule

lists all material consents, waivers and approvals under any of Raven's or any

of its subsidiaries' agreements, contracts, licenses or leases required to be

obtained in connection with the consummation of the transactions contemplated

hereby.

(b) No consent, approval, order or authorization of, or registration,

declaration or filing with any court, administrative agency or commission or

other governmental authority or instrumentality ("Governmental Entity") is

required by or with respect to Raven in connection with the execution and

delivery of this Agreement or the consummation of the transactions contemplated

hereby, except for (i) the filing of the Certificate of Merger with the

Secretary of State of the State of Delaware, (ii) such consents, approvals,

orders, authorizations, registrations, declarations and filings as may be

required under applicable federal and state securities laws and the laws of any

foreign country and (iii) such other consents, authorizations, filings,

approvals and registrations which, if not obtained or made, would not be

reasonably expected to have a Material Adverse Effect on Raven or Parent or be

reasonably expected to have a material adverse effect on the ability of the

parties to consummate Merger I.

2.5 Section 203 of the Delaware General Corporation Law Not Applicable.

The Board of Directors of Raven has taken all necessary actions so that the

restrictions contained in Section 203 of the Delaware General Corporation Law

applicable to a "business combination" (as defined in Section 203) will not

apply to the execution, delivery or performance of this Agreement or to the

consummation of Merger I or the other transactions contemplated by this

Agreement.

15

<PAGE>

2.6 Raven Financial Statements. The audited consolidated financial

statements (including any related notes thereto) representing the financial

condition of Raven as of December 31, 2004, December 31, 2005 and December 31,

2006 and the unaudited financial statements (including the notes thereto)

representing the financial condition of Raven as of September 30, 2007 were

prepared in accordance with U.S. generally accepted accounting principles

("GAAP") applied on a consistent basis throughout the periods involved (except

as may be indicated in the notes thereto) and fairly present the consolidated

financial position of Raven and its subsidiaries as of the respective dates

thereof and the consolidated results of its operations and cash flows for the

periods indicated, except that the unaudited interim financial statements are

subject to normal year-end adjustments which are not expected to be material in

amount. Except as disclosed in Raven's audited consolidated financial statements

(including the notes thereto) as of December 31, 2006 and the unaudited

financial statements (including the notes thereto) as of September 30, 2007

(collectively, the "Raven Financials"), neither Raven nor any of its

subsidiaries has any liabilities (absolute, accrued, contingent or otherwise) of

a nature required to be disclosed on a balance sheet or in the related notes to

the consolidated financial statements prepared in accordance with GAAP which

are, individually or in the aggregate, material to the business, results of

operations or financial condition of Raven and its subsidiaries taken as a

whole, except (i) liabilities incurred in connection with the transactions

contemplated in this Agreement, which shall be paid and satisfied by Raven prior

to the Effective Time of Merger I, (ii) liabilities described on Schedule 2.6 of

the Raven Disclosure Schedule, or (iii) liabilities incurred following December

31, 2006 in the ordinary course of business consistent with past practices in

both type and amount.

2.7 Absence of Certain Changes or Events. Except as set forth in Section

2.7 of the Raven Disclosure Schedule, since December 31, 2006 through the date

of this Agreement, Raven has conducted its business only in the ordinary course

of business consistent with past practice, and there has not been: (i) any event

that has had, or that would be reasonably expected to result in, a Material

Adverse Effect on Raven, (ii) any material change by Raven in its accounting

methods, principles or practices, except as required by concurrent changes in

GAAP, (iii) any revaluation by Raven of any of its assets having a Material

Adverse Effect on Raven, or (iv) writing off of notes or accounts receivable

other than in the ordinary course of business, or (v) other actions, events or

occurrences that would have required the consent of Parent under subsections

(a), (c), (d), (f), (g), (i) clauses (ii) and (iv) only, (k), (l) or (n) of

Section 4.1 of this Agreement had such action, event or occurrence taken place

after the execution and delivery of this Agreement.

2.8 Taxes.

(a) As used in this Agreement, the terms "Tax" and "Taxes" mean all

income, profits, gross receipts, environmental, customs duty, capital stock,

sales, use, occupancy, value added, ad valorem, stamp, franchise, withholding,

payroll, employment, unemployment, disability, excise, property, production and

other taxes, duties or assessments of any nature imposed by any Governmental

Entity (whether national, local, municipal or otherwise) or political

subdivision thereof, together with all interest, penalties and additions imposed

with respect to such Taxes and any interest in respect of such penalties or

additions.

16

<PAGE>

(b) Each of the material returns, declarations, estimates, information

statements or reports required to be filed with a Governmental Entity with

respect to Taxes ("Tax Returns") by or with respect to Raven: (i) has been

timely filed on or before the applicable due date (including any extensions of

such due date) and (ii) is true and complete in all material respects. All

material Taxes due and payable by Raven (whether or not shown to be due on filed

Tax Returns) have been timely paid, except to the extent such amounts are being

contested in good faith by Raven or are properly reserved for in the Raven

Financials. There are no liens for Taxes on any asset of Raven other than liens

for Taxes not yet due and payable.

(c) All material Taxes that Raven has been required to collect or

withhold have been duly collected or withheld and, to the extent required by

applicable law when due, have been duly and timely paid to the proper

Governmental Entity.

(d) There has not been any audit, examination or other administrative

or court proceeding for or relating to any liability in respect of Taxes by any

Governmental Entity in respect of which Raven has received a written notice, and

Raven has not been notified in writing by any Governmental Entity that any such

audit, examination or other administrative or court proceeding involving Taxes

is contemplated or pending. No extension of time with respect to any date on

which a Tax Return was required to be filed by Raven is in force (except where

such Tax Return was filed), and no waiver or agreement by or with respect to

Raven is in force for the extension of time for the payment, collection or

assessment of any Taxes, and no request has been made by Raven in writing for

any such extension or waiver (except, in each case, in connection with any

request for extension of time for filing Tax Returns). No claim has been made in

writing to Raven by any Governmental Entity in a jurisdiction where Raven does

not file Tax Returns that Raven is subject to taxation by that jurisdiction and,

to Raven's knowledge, there are no facts or basis upon which any such claim

could reasonably be made. No issues relating to any material amount of Taxes

were raised by the relevant Governmental Entity in any completed audit or

examination that would reasonably be expected to recur in a later taxable

period.

(e) The unpaid Taxes of Raven did not, as of the date of Raven's

audited financial statements for the fiscal year ended December 31, 2006, exceed

the reserve for Tax liability (excluding any reserve for deferred Taxes

established to reflect timing differences between book and Tax items) set forth

on the face of the balance sheet contained in such audited financial statements.

Since the date of the most recent audited financial statements, Raven has not

incurred any liability for Taxes outside of the ordinary course of business or

otherwise inconsistent with past custom or practice.

(f) Raven has not agreed, or will not be required, to make any

adjustment for any period after the date of this Agreement pursuant to Section

481(a) of the Code by reason of any change in any accounting method made prior

to the date hereof. There is no application pending with any Governmental Entity

requesting permission for any such change in any accounting method of Raven, and

the Internal Revenue Service has not issued in writing any pending proposal

regarding any such adjustment or change in accounting method.

(g) No closing agreements, private letter rulings, technical advice

memoranda or similar agreements or rulings have been entered into by Raven with

any taxing authority or

17

<PAGE>

issued by any taxing authority to Raven. There are no outstanding rulings of, or

request for rulings with, any Governmental Entity addressed to Raven that are,

or if issued would be, binding on Raven.

(h) Raven is not a party to any agreement with any third party

relating to allocating or sharing the payment of, or liability for, Taxes or Tax

benefits. Raven has no liability for the Taxes of any third party under Treasury

Regulation ss.1.1502-6 (or any similar provision of state, local or foreign law)

as a transferee or successor, by contract or otherwise (other than entities for

which Raven is or was the common parent).

(i) Raven is not a member of an affiliated group of corporations

within the meaning of Section 1504 of the Code or of any group that has filed a

combined, consolidated or unitary Tax return under state, local or foreign Tax

law (other than a group the common parent of which is Raven).

(j) Raven does not (i) own a single member limited liability company

which is treated as a disregarded entity, and (ii) is not a stockholder of a

"controlled foreign corporation" as defined in Section 957 of the Code.

(k) Raven has not participated in a "listed transaction" within the

meaning of Treasury Regulation Section 1.6011-4(b). Raven believes it has

substantial authority for or has disclosed on its respective United States

federal income Tax Returns all positions taken therein that could give rise to a

substantial understatement of United States federal income Tax within the

meaning of Section 6662 of the Code.

(l) Raven is not (and has not been for the five-year period ending at

Closing) a "United States real property holding corporation" as defined in

Section 897(c)(2) of the Code and the applicable Treasury Regulations.

(m) Raven does not have a permanent establishment in any country other

than the United States, as defined in any applicable Tax treaty between the

United States and such other country.

2.9 Intellectual Property. For purposes of this Agreement, the following

terms shall be defined as follows:

 

(a) "IP Rights" means any and all of the following in any country or

region: (A) Copyrights, Patent Rights, Trademark Rights, trade dress rights,

domain name registrations, website addresses, trade secrets, technology

licenses, know-how, confidential information, shop rights and all other

intellectual and industrial property rights; and (B) the right (whether at law,

in equity, by contract or otherwise) to enjoy or otherwise exploit any of the

foregoing, including the right to sue for and seek remedies against past,

present and future infringements of any or all of the foregoing or injury to the

good will therein, to institute and prosecute all suits and proceedings and take

all actions that may be necessary or proper to collect, assert or enforce any

claim, right or title of any kind in and to any and all of the foregoing under

the laws of any jurisdiction worldwide.

18

<PAGE>

(b) "Copyrights" means all copyrightable and copyrighted works,

registered or unregistered, published or unpublished, including without

limitation databases and other compilations of information and all categories of

works eligible for protection under U.S. and international copyright law,

including rights of authorship, exclusive ownership, of attribution and

integrity, and include exclusive rights to use, copy, publish, reproduce,

distribute, perform, display sell, assign, adapt, create derivative works,

import, export, and transmit, as well as exclusive rights to register, seek

registration, obtain renewals and extensions of registrations, together with all

other rights and interests accruing under U.S. and international copyright law.

(c) "Material Raven IP Rights" means all Raven IP Rights other than

those which, individually or in the aggregate, are not material to the conduct

of the current Raven business; provided, however, that all Raven IP Rights that

relate directly to and are necessary for the development of the Raven Programs

and Candidates shall constitute Material Raven IP Rights.

(d) "Patent Rights" means all invention disclosure documents, issued

patents, pending patent applications and abandoned patents and patent

applications provided that they can be revived (which for purposes of this

Agreement shall include utility models, design patents, industrial designs,

certificates of invention and applications for certificates of invention and

priority rights) in any country or region, including all provisional

applications, substitutions, continuations, continuations-in-part, divisions,

renewals, reissues, re-examinations and extensions thereof.

(e) "Raven IP Rights" means all IP Rights owned solely or co-owned by

Raven or in which Raven has any right, title or interest.

(f) "Raven Programs and Candidates" means the drug discovery programs

and platform technologies of Raven, including its cell line development and

whole cell immunization technologies, conditioned cell immunization technology,

antibody discoveries, and tumor stem cell discoveries, including identification,

purification and testing development and technology, and the drug candidates

which may be derived therefrom, including without limitation murine, chimeric

and humanized Rav 12, Rav 13, Rav 14, Rav 15, Rav 17, Rav 18, Rav 19 antibodies.

A "drug" as used in this section connotes any prophylactic and/or therapeutic

composition.

(g) "Trademark Rights" means all trademarks, service marks, domain

names, web site addresses, intranet sites, trade dress, logos, trade names,

corporate names, business identifiers, registered or unregistered, together with

all translations, transliterations, adaptations, derivations, and combinations

thereof and including all goodwill associated therewith, and all applications,

registrations, and renewals in connection therewith, and all rights to register,

seek registration, maintain and obtain renewals of registrations, together with

all other rights and interests accruing under U.S. trademark law or the national

or regional trademark laws of any applicable jurisdiction worldwide.

(h) Part 1 of Section 2.9(b) of the Raven Disclosure Schedule lists

all of the Patent Rights and all registered Trademark Rights (or Trademark

Rights for which applications for registration have been filed) owned solely by

Raven as of the date hereof, setting forth in

19

<PAGE>

each case the jurisdictions in which patents have been issued, patent

applications have been filed, trademarks have been registered and trademark

applications have been filed, along with the respective application,

registration or filing number and prosecution status or subsequent registration

activity thereof. Part 2 of Section 2.9(b) of the Raven Disclosure Schedule

lists, as of the date hereof, all of the Patent Rights and all registered

Trademark Rights (or Trademark Rights for which applications for registration

have been filed) in which Raven has any co-ownership interest, other than those

owned solely by Raven, setting forth in each case the jurisdictions in which

patents have been issued, patent applications have been filed, trademarks have

been registered and trademark applications have been filed, along with the

respective application, registration or filing number and prosecution status or

subsequent registration activity thereof. Part 3 of Section 2.9(b) of the Raven

Disclosure Schedule lists, to the knowledge of Raven as of the date hereof, all

of the material Patent Rights and all registered Trademark Rights (or Trademark

Rights for which applications for registration have been filed) in which Raven

has any right, title or interest (indicating where that right, title or interest

is exclusive to Raven), other than those owned solely or co-owned by Raven.

(i) Section 2.9(c) of the Raven Disclosure Schedule lists all oral and

written contracts, agreements, licenses and other arrangements in effect as of

the date of this Agreement under which any third party has licensed, granted or

conveyed to Raven any right, title or interest in or to any Material Raven IP

Rights, other than "shrink wrap" or "click through" license agreements

accompanying widely available computer software that has not been modified or

customized for Raven, or use licenses included in the purchase agreements for

certain general consumables of Raven, including but not limited to PCR kits,

assays and chemicals.

(j) Section 2.9(d) of the Raven Disclosure Schedule lists all written

contracts, agreements, licenses or other arrangements in effect as of the date

of this Agreement under which Raven has licensed, granted or conveyed to any

third party any right, title or interest in or to any Material Raven IP Rights.

(k) Raven owns, co-owns or otherwise possesses legally enforceable

rights to in and to all Material Raven IP Rights, free and clear of all liens,

pledges, charges, leases, mortgages and other encumbrances (other than Permitted

Encumbrances), and for Material Raven IP Rights owned or co-owned by Raven, also

free and clear of exclusive licenses and non-exclusive licenses not granted in

the ordinary course of business. Raven owns exclusively all IP Rights necessary

for and comprising the Raven Programs and Candidates. No party is overtly

challenging in writing to Raven the right, title or interest of Raven in, to or

under the Material Raven IP Rights, or the validity, enforceability or claim

construction of any Patent Rights owned or co-owned or exclusively licensed to

Raven, and there is no opposition, cancellation, proceeding, written objection

or written claim, pending in any court or with any regulatory body with regard

to any Material Raven IP Rights and the Material Raven IP Rights are not subject

to any outstanding order, judgment, decree or agreement adversely affecting

Raven's use thereof or its rights thereto. To the knowledge of Raven, no valid

basis exists for any of the foregoing challenges or claims.

(l) Raven's current policies and procedures to protect and maintain

the confidentiality of the proprietary know-how and trade secrets included in

the Raven IP Rights are listed on Section 2.9(f) of the Raven Disclosure

Schedule. Raven has taken all reasonable

20

<PAGE>

measures to protect and maintain the Raven IP Rights. All current and former

officers and employees of, and consultants and independent contractors to, Raven

who have contributed to the creation or development of any Material Raven IP

Rights have assigned all such rights to Raven, and have executed and delivered

to Raven an agreement (containing no exceptions or exclusions from the scope of

its coverage) regarding the protection of proprietary information and the

assignment to Raven, of any IP Rights arising from services performed for Raven

by such persons, the forms of which agreements and any individual material

variations thereof have been made available in a data room for review by Parent

or its advisors. To the knowledge of Raven, no current or former officers and

employees of, or consultants or independent contractors to, Raven have breached

any material term of any such agreements.

(m) The conduct of the Current Raven Business does not infringe,

constitute contributory infringement, inducement to infringe, misappropriation

or unlawful use of any valid and enforceable IP Rights of any other person.

"Current Raven Business" means all business related to the Raven Programs and

Candidates. Raven has not received any oral or written claims for or notice of

infringement, contributory infringement, inducement to infringe,

misappropriation or unlawful use of any IP Rights of any other Person.

(n) As of the date of this Agreement, Raven has received no notice or

information that any Material Raven IP Rights are being infringed or

misappropriated by any third party.

(o) Neither the execution, delivery or performance of this Agreement

by Raven nor the consummation by Raven of the transactions contemplated by this

Agreement will contravene, conflict with or result in any limitation on Raven's

right, title or interest in or to any Raven IP Rights.

2.10 Compliance; Permits; Restrictions.

(a) Except for any conflicts, defaults or violations which would not

reasonably be expected to have a Material Adverse Effect on Raven, neither Raven

nor any of its subsidiaries is in conflict with, or in default or violation of

(i) any law, rule, regulation, order, judgment or decree applicable to Raven or

any of its subsidiaries or by which its or any of their respective properties is

bound or affected, or (ii) any note, bond, mortgage, indenture, contract,

agreement, lease, license, permit, franchise or other instrument or obligation

to which Raven or any of its subsidiaries is a party or by which Raven or any of

its subsidiaries or its or any of their respective properties is bound or

affected. No investigation or review by any governmental or regulatory body or

authority is pending or, to the knowledge of Raven, threatened against Raven or

its subsidiaries, nor, to Raven's knowledge, has any governmental or regulatory

body or authority indicated an intention to conduct the same.

(b) Except where the failure to hold a permit, license, variance,

exemption, order or approval from governmental authorities would be reasonably

expected to have a Material Adverse Effect on Raven, Raven and its subsidiaries

hold all permits, licenses, variances, exemptions, orders and approvals from

governmental authorities which are necessary to the operation of the business of

Raven and its subsidiaries taken as a whole (collectively, the "Raven Permits").

Raven and its subsidiaries are in compliance with the terms of the Raven

21

<PAGE>

Permits, except where the failure to so comply would not have a Material Adverse

Effect on Raven. No action, proceeding, revocation proceeding, amendment

procedure, writ, injunction or claim is pending or, to the knowledge of Raven,

threatened, which seeks to revoke or limit any Raven Permit. A true, complete

and correct list of the Raven Permits is set forth in Section 2.10(b) of the

Raven Disclosure Schedule, which further sets forth all material consents

required to be obtained in order for such Raven Permits to continue in place or

to be available to the Surviving Entity immediately following the Closing.

(c) All biological and drug products being manufactured, distributed

or developed by or on behalf of Raven ("Raven Pharmaceutical Products") that are

subject to the jurisdiction of the Food and Drug Administration ("FDA") are

being manufactured, labeled, stored, tested, distributed, and marketed in

compliance in all respects with all applicable requirements under the Federal

Food, Drug, and Cosmetic Act ("FDCA"), the Public Health Service Act, their

applicable implementing regulations, and all comparable state laws and

regulations, except as would not reasonably be expected to have a Material

Adverse Effect on Raven.

(d) All clinical trials conducted by or on behalf of Raven have been,

and are being conducted in compliance with the applicable requirements of Good

Clinical Practice, Informed Consent, and all applicable requirements relating to

protection of human subjects contained in 21 CFR Parts 50, 54, and 56, except as

would not reasonably be expected to have a Material Adverse Effect on Raven.

(e) All manufacturing operations for drug products conducted by or for

the benefit of Raven have been and are being conducted in accordance with the

FDA's current Good Manufacturing Practices for drug and biological products,

except as would not reasonably be expected to have a Material Adverse Effect on

Raven. In addition, Raven is in compliance with all applicable registration and

listing requirements set forth in 21 U.S.C. Section 360 and 21 CFR Part 207 and

all similar applicable laws and regulations, except as would not reasonably be

expected to have a Material Adverse Effect on Raven.

(f) Neither Raven nor any representative of Raven, nor to the

knowledge of Raven, any of its licensees or assignees of Raven IP Rights has

received any notice that the FDA or any other Governmental Entity has initiated,

or threatened to initiate, any action to suspend any clinical trial, suspend or

terminate any Investigational New Drug Application sponsored by Raven or

otherwise restrict the preclinical research on or clinical study of any Raven

Pharmaceutical Product or any biological or drug product being developed by any

licensee or assignee of Raven IP Rights based on such intellectual property, or

to recall, suspend or otherwise restrict the manufacture of any Raven

Pharmaceutical Product.

(g) Neither Raven nor, to the knowledge of Raven, any of its officers,

key employees, agents or clinical investigators acting for Raven, has committed

any act, made any statement or failed to make any statement that would

reasonably be expected to provide a basis for the FDA to invoke its policy with

respect to "Fraud, Untrue Statements of Material Facts, Bribery, and Illegal

Gratuities" set forth in 56 Fed. Reg. 46191 (September 10, 1991) and any

amendments thereof. Additionally, neither Raven, nor to the knowledge of Raven,

any officer, key employee or agent of Raven has been convicted of any crime or

engaged in any conduct that

22

<PAGE>

would reasonably be expected to result in (i) debarment under 21 U.S.C. Section

335a or any similar state law or (ii) exclusion under 42 U.S.C. Section 1320a-7

or any similar state law or regulation.

(h) All animal studies or other preclinical tests performed in

connection with or as the basis for any regulatory approval required for the

Raven Pharmaceutical Products (1) either (x) have been conducted in accordance,

in all material respects, with applicable Good Laboratory Practice requirements

contained in 21 CFR Part 58, or (y) were not required to be conducted in

accordance with Good Laboratory Practice requirements contained in 21 CFR Part

58 and (2) have employed the procedures and controls generally used by qualified

experts in animal or preclinical study of products comparable to those being

developed by Raven.

(i) Raven has made available to Parent copies of any and all notices

of inspectional observations, establishment inspection reports and any other

documents received from the FDA, that indicate or suggest lack of compliance

with the regulatory requirements of the FDA. Raven has made available to Parent

for review all correspondence to or from the FDA, minutes of meetings, written

reports of phone conversations, visits or other contact with the FDA, notices of

inspectional observations, establishment inspection reports, and all other

documents concerning communications to or from the FDA, or prepared by the FDA

or which bear in any way on Raven's compliance with regulatory requirements of

the FDA, or on the likelihood of timing of approval of any Raven Pharmaceutical

Products.

(j) Raven has not been notified in writing of any proceedings pending

with respect to a violation by Raven of the FDCA, FDA regulations adopted

thereunder, the Controlled Substance Act or any other legislation or regulation

promulgated by any other United States governmental entity.

2.11 Litigation. Except as set forth in Section 2.11 of the Raven

Disclosure Schedule, as of the date of this Agreement, there is no action, suit,

proceeding, claim, arbitration or investigation pending, or as to which Raven or

any of its subsidiaries has received any notice of assertion. There are not any

overtly threatened actions, suits, proceedings, claims for arbitration or

investigations against Raven or any of its subsidiaries which would reasonably

be expected to have a Material Adverse Effect on Raven.

2.12 Brokers' and Finders' Fees. Except as set forth in Section 2.12 of

the Raven Disclosure Schedule, Raven has not incurred, nor will it incur,

directly or indirectly, any liability for brokerage or finders' fees or agents'

commissions or any similar charges in connection with this Agreement or any

transaction contemplated hereby.

2.13 Employee Benefit Plans.

(a) Section 2.13 of the Raven Disclosure Schedule sets forth, as of

the date of this Agreement, a complete and accurate list of each plan, program,

policy, practice, contract, agreement or other arrangement providing for

employment, compensation, retirement, pension, deferred compensation, loans,

severance, separation, relocation, repatriation, expatriation, visas, work

permits, termination pay, performance awards, bonus, incentive, stock option,

stock purchase, stock bonus, phantom stock, stock appreciation right,

supplemental retirement, profit

23

<PAGE>

sharing, fringe benefits, cafeteria benefits, medical benefits, life insurance,

disability benefits, accident benefits, salary continuation, accrued leave,

vacation, sabbatical, sick pay, sick leave, unemployment benefits or other

benefits, whether written or unwritten, including each "voluntary employees

beneficiary association" ("VEBA"), under Section 501(c)(9) of the Code and each

"employee benefit plan" within the meaning of Section 3(3) of the Employee

Retirement Income Security Act of 1974, as amended ("ERISA"), in each case, for

active, retired or former employees, directors or consultants, which is

currently sponsored, maintained, contributed to, or required to be contributed

to or with respect to which any material liability is reasonably expected to be

borne by Raven or any trade or business (whether or not incorporated) that is or

at any relevant time was treated as a single employer with Raven within the

meaning of Section 414 of the Code (an "ERISA Affiliate"), (collectively, the

"Raven Employee Plans"). Neither Raven nor, to the knowledge of Raven, any other

person or entity, has made any commitment to modify, change or terminate any

Raven Employee Plan, other than with respect to a modification, change or

termination required by ERISA or the Code. There are no loans by Raven to any of

its officers, employees, contractors or directors outstanding on the date

hereof, except pursuant to loans under any Raven Employee Plan intended to

qualify under Section 401(k) of the Code, and there have never been any loans by

Raven subject to Regulation U of the Board of Governors of the Federal Reserve

System as from time to time in effect and any successor to all or a portion

thereof establishing margin requirements.

(b) Documents. Raven has made available to Parent true and complete

copies of each of Raven Employee Plans and related plan documents, including

trust documents, group annuity contracts, plan amendments, insurance policies or

contracts, participant agreements, employee booklets, administrative service

agreements, summary plan descriptions, compliance and nondiscrimination tests

(including 401(k) and 401(m) tests) for the last three plan years, standard

COBRA forms and related notices, registration statements and prospectuses and,

to the extent still in its possession, any material employee communications

relating thereto. With respect to each Raven Employee Plan that is subject to

ERISA reporting requirements, Raven has made available in a data room for review

by Parent copies of the Form 5500 reports filed for the last three (3) plan

years. Raven has made available in a data room for review by Parent the most

recent Internal Revenue Service determination or opinion letter issued with

respect to each such Raven Employee Plan, and to Raven's knowledge, nothing has

occurred since the issuance of each such letter that would reasonably be

expected to cause the loss of the tax-qualified status of any Raven Employee

Plan subject to Code Section 401(a). Raven has made available in a data room for

review by Parent all filings made by Raven or any ERISA Affiliate of Raven with

any Governmental Entity with respect to any Raven Employee Plan to the extent

relevant to any ongoing obligation or liability of Raven, including any filings

under the IRS' Employee Plans Compliance Resolution System Program or any of its

predecessors or the Department of Labor Delinquent Filer Program.

(c) Compliance. Each Raven Employee Plan is being, and has been,

administered substantially in accordance with its terms and in material

compliance with the requirements prescribed by any and all statutes, rules and

regulations (including ERISA and the Code). Raven and each ERISA Affiliate are

not in material default under or material violation of, and have no knowledge of

any material default or material violation by any other party to, any of Raven

Employee Plans. Any Raven Employee Plan intended to be qualified under Section

401(a) of the Code has either obtained from the Internal Revenue Service a

favorable

24

<PAGE>

determination letter as to its qualified status under the Code, including all

currently effective amendments to the Code, and the corresponding related

exemption of its trust from U.S. federal income taxation under Section 501(a) of

the Code, if applicable, or has applied to the Internal Revenue Service for such

favorable determination letter within the remedial amendment period under

Section 401(b) of the Code. None of Raven Employee Plans promises or provides

retiree medical or other retiree welfare benefits to any person. Raven has not

engaged in, or participated in, any transaction which would be considered a

non-exempt "prohibited transaction," as such term is defined in Section 406 of

ERISA or Section 4975 of the Code, and to Raven's knowledge, no other

third-party fiduciary and/or party-in-interest has engaged in any such

"prohibited transaction" with respect to any Raven Employee Plan. Neither Raven

nor any ERISA Affiliate is subject to any liability or penalty under Sections

4976 through 4980 of the Code or Title I of ERISA with respect to any Raven

Employee Plan. All contributions required to be made by Raven or any ERISA

Affiliate to any Raven Employee Plan have been timely paid or accrued on Raven

Balance Sheet, if required under GAAP. With respect to each Raven Employee Plan,

no "reportable event" within the meaning of Section 4043 of ERISA (excluding any

such event for which the thirty (30) day notice requirement has been waived

under the regulations to Section 4043 of ERISA) has occurred, nor has any event

described in Section 4062, 4063 or 4041 of ERISA occurred. Each Raven Employee

Plan subject to ERISA has prepared in good faith and timely filed all requisite

governmental reports, which were true and correct in all material respects as of

the date filed, and has properly and timely filed and distributed or posted all

notices and reports to employees required under ERISA to be filed, distributed

or posted with respect to each such Raven Employee Plan. No suit, administrative

proceeding or action has been brought, or to the knowledge of Raven is overtly

threatened in communication with Raven, against or with respect to any such

Raven Employee Plan, including any audit or inquiry by the Internal Revenue

Service or the United States Department of Labor (other than routine claims for

benefits arising under such plans). There has been no amendment to, or written

interpretation or announcement by Raven or any ERISA Affiliate regarding any

Raven Employee Plan that would materially increase the expense of maintaining

such Raven Employee Plan above the level of expense incurred with respect to

that plan for the fiscal year ended December 31, 2006. None of the assets of

Raven or any ERISA Affiliate is, or may reasonably be expected to become, the

subject of any lien arising under Section 302 of ERISA or Section 412(n) of the

Code. All contributions and payments pursuant to Raven Employee Plans are

deductible under Section 162 or 404 of the Code. No assets of any Raven Employee

Plan are subject to a material amount of Tax as unrelated business taxable

income under Section 511 of the Code, and no excise Tax could be imposed upon

Raven under Chapter 43 of the Code. With respect to Raven Employee Plans, no

event has occurred and, to the knowledge of Raven, there exists no condition or

set of circumstances in connection with which Raven would reasonably expect to

be subject to any material liability (other than for liabilities with respect to

routine benefit claims) under the terms of, or with respect to, such Raven

Employee Plans, ERISA, the Code or any other applicable law.

(d) No Title IV or Multiemployer Plan. Neither Raven nor any ERISA

Affiliate has ever maintained, established, sponsored, participated in or

contributed to, or is obligated to contribute to, or otherwise incurred any

obligation or liability (including any contingent liability) under, any

"multiemployer plan" (as defined in Section 3(37) of ERISA) or any "pension

plan" (as defined in Section 3(2) of ERISA) subject to Title IV of ERISA or

Section 412 of the Code. Neither Raven nor any ERISA Affiliate has, as of the

date of this

25

<PAGE>

Agreement, any actual or potential withdrawal liability (including any

contingent liability) for any complete or partial withdrawal (as defined in

Sections 4203 and 4205 of ERISA) from any multiemployer plan.

(e) No Self-Insured Plans. Neither Raven nor any ERISA Affiliate has

ever maintained, established, sponsored, participated in or contributed to any

self-insured plan that is governed by ERISA and that provides benefits to

employees (including any such plan pursuant to which a stop-loss policy or

contract applies).

(f) COBRA, FMLA, HIPAA, Cancer Rights. With respect to each Raven

Employee Plan, Raven is in material compliance with (i) the applicable health

care continuation and notice provisions of the Consolidated Omnibus Budget

Reconciliation Act of 1985 ("COBRA") and the regulations thereunder or any state

law governing health care coverage extension or continuation; (ii) the

applicable requirements of the Family and Medical Leave Act of 1993 and the

regulations thereunder; (iii) the applicable requirements of the Health

Insurance Portability and Accountability Act of 1996 ("HIPAA"); and (iv) the

applicable requirements of the Cancer Rights Act of 1998. Raven has no material

unsatisfied obligations to any employees, former employees or qualified

beneficiaries pursuant to COBRA, HIPAA or any state law governing health care

coverage extension or continuation.

(g) Section 409A. No payment pursuant to any Raven Employee Plan or

other arrangement with respect to any "service provider" (as such term is

defined in Section 409A of the Code and the United States Department of Treasury

Regulations and IRS guidance thereunder), including the grant, vesting or

exercise of any stock option, has subjected or will subject any person to tax

pursuant to Section 409A(1) of the Code, whether pursuant to the consummation of

the transactions contemplated by this Agreement or otherwise. All Raven Options

have been appropriately authorized by the Board of Directors of Raven or an

appropriate committee thereof, including approval of the option exercise price

or the methodology for determining the option exercise price and the substantive

option terms. Each Raven Option granted to an employee or other service provider

that is subject to income tax under United States laws was granted at an

exercise price not less than the fair market value of Raven's Common Stock as

determined under Section 409A of the Code and the applicable United States

Department of Treasury regulations as of the date the Raven Option was granted

(within the meaning of United States Department of Treasury Regulation

ss.1.409A-1(b)(5)(vi)(B)). No Raven Option has been designated by the Board of

Directors of Raven, or the committee thereof which approved such Raven Option,

to take effect on a date prior to the date of grant of such Raven Option (within

the meaning of United States Department of Treasury Regulation

ss.1.409A-1(b)(5)(vi)(B)), and neither the Board of Directors of Raven or any

committee thereof has established the exercise price of any Raven Option

following the designated date of grant of such Raven Option.

(h) Effect of Transaction. The consummation of Merger I will not (i)

entitle any current or former employee or other service provider of Raven or any

ERISA Affiliate to severance benefits or any other payment (including

unemployment compensation, golden parachute, bonus or benefits under any Raven

Employee Plan), except as expressly provided in Section 2.13 of the Raven

Disclosure Schedule; (ii) accelerate the time of payment or vesting of any such

benefits or increase the amount of compensation due any such employee or service

26

<PAGE>

provider; (iii) result in the forgiveness of any indebtedness; (iv) result in

any obligation to fund future benefits under any Raven Employee Plan; or (v)

result in the imposition of any restrictions with respect to the amendment or

termination of any of Raven Employee Plans. No benefit payable or that may

become payable by Raven pursuant to any Raven Employee Plan in connection with

the transactions contemplated by this Agreement or as a result of or arising

under this Agreement shall constitute an "excess parachute payment" (as defined

in Section 280G(b)(1) of the Code) subject to the imposition of an excise Tax

under Section 4999 of the Code or the deduction for which would be disallowed by

reason of Section 280G of the Code. Each Raven Employee Plan can be amended,

terminated or otherwise discontinued after the Effective Time of Merger I in

accordance with its terms, without material liability to Parent or Raven other

than ordinary administration expenses typically incurred in a termination event.

(i) Raven is not a party to any contract, agreement, plan or

arrangement, including but not limited to the provisions of this Agreement,

covering any employee or former employee of Raven that, individually or in the

aggregate, would reasonably be expected to give rise to the payment of any

material amount that would be subject to the deductibility limits of Section 404

of the Code.

(j) Raven does not sponsor, contribute to or have any liability with

respect to any employee benefit plan, program or arrangement that provides

benefits to non-resident aliens with no United States source income outside of

the United States.

(k) With respect to each Raven Employee Plan that is an "employee

welfare benefit plan" within the meaning of Section 3(2) of ERISA, other than

any health care reimbursement plan under Section 125 of the Code, all claims

incurred (including claims incurred but not reported) by employees, former

employees and their dependents thereunder for which Raven is, or will become,

liable are (i) insured pursuant to a contract of insurance whereby the insurance

company bears any risk of loss with respect to such claims, (ii) covered under a

contract with a health maintenance organization (an "HMO") pursuant to which the

HMO bears the liability for such claims, or (iii) reflected as a liability or

accrued for on Raven Financial Statements for the fiscal year ended December 31,

2006.

2.14 Absence of Liens and Encumbrances; Condition of Equipment. Raven and

each of its subsidiaries has good and valid title to, or, in the case of leased

properties and assets, valid leasehold interests in, all material tangible

properties and assets, real, personal and mixed, necessary for use in its

business, free and clear of any liens or encumbrances except as reflected in the

Raven Financials and except for liens for Taxes not yet due and payable. Each

such tangible asset is in a good state of maintenance and repair, free from

material defects and in good operating condition (subject to normal wear and

tear) and is suitable for the purposes for which it presently is used.

2.15 Environmental Matters. Except as would not individually or in the

aggregate reasonably be expected to have a Material Adverse Effect on Raven:

(a) Hazardous Material. No underground storage tanks and no amount of

any substance that has been designated by any Governmental Entity or by

applicable federal, state or local law, to be radioactive, toxic, hazardous or

otherwise a danger to health or the environment,

27

<PAGE>

including, without limitation, PCBs, asbestos, petroleum, urea-formaldehyde and

all substances listed as hazardous substances pursuant to the Comprehensive

Environmental Response, Compensation, and Liability Act of 1980, as amended, or

defined as a hazardous waste pursuant to the United States Resource Conservation

and Recovery Act of 1976, as amended, and the regulations promulgated pursuant

to said laws, (a "Hazardous Material"), but excluding office and janitorial

supplies, are present, as a result of the deliberate actions of Raven or any of

its subsidiaries, or, to Raven's knowledge, as a result of any actions of any

third party or otherwise, in, on or under any property, including the land and

the improvements, ground water and surface water thereof, that Raven or any of

its subsidiaries has at any time owned, operated, occupied or leased.

(b) Hazardous Material Activities. To the knowledge of Raven, neither

Raven nor any of its subsidiaries has transported, stored, used, manufactured,

disposed of, released or exposed its employees or others to Hazardous Materials

in violation of any law in effect on or before the date hereof, nor has Raven or

any of its subsidiaries disposed of, transported, sold, or manufactured any

product containing a Hazardous Material (collectively, "Hazardous Material

Activities") in violation of any rule, regulation, treaty or statute promulgated

by any Governmental Entity in effect prior to or as of the date hereof to

prohibit, regulate or control Hazardous Materials or any Hazardous Material

Activity.

(c) Permits. Raven and its subsidiaries currently hold all material

environmental approvals, permits, licenses, clearances and consents (the "Raven

Environmental Permits") necessary for the conduct of Raven's and its

subsidiaries' Hazardous Material Activities and other businesses of Raven and

its subsidiaries as such activities and businesses are currently being

conducted.

(d) Environmental Liabilities. No material action, proceeding,

revocation proceeding, amendment procedure, writ, injunction or claim is pending

or, to the knowledge of Raven, threatened concerning any Raven Environmental

Permit, Hazardous Material or any Hazardous Material Activity of Raven or any of

its subsidiaries. Raven is not aware of any fact or circumstance which would

reasonably be expected to involve Raven or any of its subsidiaries in any

environmental litigation or impose upon Raven or any of its subsidiaries any

environmental liability.

2.16 Labor Matters.

(a) Section 2.16(a) of the Raven Disclosure Schedule sets forth a

true, complete and correct list of all employees of Raven along with their

position and actual annual rate of compensation. All employees have entered into

nondisclosure and assignment of inventions agreements with Raven, true, complete

and correct copies of which have previously been made available to Parent. To

the knowledge of Raven, no employee of Raven is in violation of any term of any

patent disclosure agreement, non-competition agreement, or any restrictive

covenant (i) to Raven, or (ii) to a former employer relating to the right of any

such employee to be employed because of the nature of the business conducted by

Raven or to the use of trade secrets or proprietary information of others. No

key employee or group of employees has threatened to terminate employment with

Raven or, to the knowledge of Raven (which for

28

<PAGE>

purposes of this representation only shall mean actual knowledge), has plans to

terminate such employment.

(b) Raven is not a party to or bound by any collective bargaining

agreement, nor has it experienced any strikes, grievances, claims of unfair

labor practices or other collective bargaining disputes.

(c) Except as disclosed in Section 2.16(c) of the Raven Disclosure

Schedule, Raven is not a party to any written: (i) agreement with any current or

former employee the benefits of which are contingent upon, or the terms of which

will be materially altered by, the consummation of Merger I or other

transactions contemplated by this Agreement; (ii) agreement with any current or

former employee of Raven providing any term of employment or compensation

guarantee extending for a period longer than one year from the date hereof or

for the payment of compensation in excess of $50,000 per annum; or (iii)

agreement or plan the benefits of which will be increased, or the vesting of the

benefits of which will be accelerated, upon the consummation of Merger I.

2.17 Agreements, Contracts and Commitments. Except as set forth in Section

2.17 of the Raven Disclosure Schedule, neither Raven nor any of its subsidiaries

is a party to or is bound by:

(a) any bonus, deferred compensation, severance, incentive

compensation, pension, profit-sharing or retirement plans, or any other employee

benefit plans or arrangements;

(b) any employment or consulting agreement, contract or commitment

with any officer or director level employee, not terminable by Raven or any of

its subsidiaries on thirty (30) days notice without liability, except to the

extent general principles of wrongful termination law may limit Raven's or any

of its subsidiaries' ability to terminate employees at will;

(c) any agreement or plan, including, without limitation, any stock

option plan, stock appreciation right plan or stock purchase plan, any of the

benefits of which will be increased, or the vesting of benefits of which will be

accelerated, by the occurrence of any of the transactions contemplated by this

Agreement or the value of any of the benefits of which will be calculated on the

basis of any of the transactions contemplated by this Agreement;

(d) any agreement of indemnification or guaranty not entered into in

the ordinary course of business other than indemnification agreements between

Raven or any of its subsidiaries and any of its officers or directors;

(e) any agreement, contract or commitment containing any covenant

limiting the freedom of Raven or any of its subsidiaries to engage in any line

of business or compete with any person;

(f) any agreement, contract or commitment relating to capital

expenditures and involving future obligations in excess of $50,000 and not

cancelable without penalty;

29

<PAGE>

(g) any agreement, contract or commitment currently in force relating

to the disposition or acquisition of assets not in the ordinary course of

business or any ownership interest in any corporation, partnership, joint

venture or other business enterprise;

(h) any mortgages, indentures, loans or credit agreements, security

agreements or other agreements or instruments relating to the borrowing of money

or extension of credit;

(i) any joint marketing or development agreement;

(j) any distribution agreement (identifying any that contain

exclusivity provisions); or

(k) any other agreement, contract or commitment (excluding real and

personal property leases) which involve payment by Raven or any of its

subsidiaries under any such agreement, contract or commitment of $50,000 or more

in the aggregate and is not cancelable without penalty within thirty (30) days.

Neither Raven nor any of its subsidiaries, nor to Raven's knowledge any other

party to a Raven Contract (as defined below), has breached, violated or

defaulted under, or received notice that it has breached, violated or defaulted

under, any of the terms or conditions of any of the agreements, contracts or

commitments to which Raven is a party or by which it is bound of the type

described in clauses (a) through (k) above (any such agreement, contract or

commitment, a "Raven Contract") in such manner as would permit any other party

to cancel or terminate any such Raven Contract, or would permit any other party

to seek damages, in either case as would reasonably be expected to have a

Material Adverse Effect on Raven. Each Raven Contract is valid, binding,

enforceable and in full force and effect.

2.18 Reorganization Matters.

(a) Raven currently conducts a "historic business" within the meaning

of Treasury Regulations Section 1.368-1(d), and no assets of Raven have been

sold, transferred, or otherwise disposed of that would prevent Parent from

continuing the "historic business" of Raven or from using a "significant

portion" of Raven's "historic business assets" in a business following the

Transaction, as such terms are used in Treasury Regulations Section 1.368-1(d).

(b) Other than any amounts paid by Raven in respect of (i) Dissenting

Shares, (ii) the cancellation of options or warrants to purchase capital stock

of Raven or (iii) the conversion of principal and interested payable under the

subordinated promissory notes issued pursuant to the Note Purchase Agreement

into shares of Series D Preferred Stock or the conversion of such shares of

Series D Preferred Stock into Raven Common Stock, neither Raven nor any Person

related to Raven within the meaning of Treasury Regulations Section

1.368-1(e)(3), (e)(4) and (e)(5) has redeemed, purchased or otherwise acquired,

or made any distributions with respect to, any of Raven's capital stock prior to

and in contemplation of the Transaction, or otherwise as part of a plan of which

the Transaction is a part.

(c) The fair market value of the assets of Raven exceeds the sum of

(1) the amount of the liabilities of Raven immediately prior to the Transaction

and the liabilities, if any,

30

<PAGE>

to which the transferred assets of Raven are subject, and (2) the amount of any

money and the fair market value of any other property (other than Parent Common

Stock) received by Raven Stockholders in connection with the Transaction. The

liabilities of Raven and the liabilities, if any, to which the transferred

assets of Raven are subject, were incurred by Raven in the ordinary course of

its business.

(d) Raven is not an investment company within the meaning of Section

368(a)(2)(F)(iii) and (iv) of the Code.

(e) Raven is not under the jurisdiction of a court in a Title 11 or

similar case within the meaning of Section 368(a)(3)(A) of the Code.

(f) Except as specifically set forth in the Agreement, Raven will pay

its respective expenses, if any, incurred in connection with the Transaction,

and Raven has not agreed to assume, and will not directly or indirectly assume,

any expense or liability, whether fixed or contingent, of any Raven Stockholder.

2.19 Registration Statement; Proxy Statement. The information supplied by

Raven for inclusion in the Registration Statement and the Proxy Statement shall

not contain any untrue statement of a material fact or omit to state any

material fact required to be stated therein or necessary in order to make the

statements therein, in light of the circumstances under which they are made, not

false or misleading, or omit to state any material fact necessary to correct any

statement provided to Parent and included in any earlier communication with

respect to the solicitation of proxies for the Parent Stockholders' Meeting

which has become false or misleading. If at any time prior to the Effective Time

of Merger I, any event relating to Raven or any of its affiliates, officers or

directors should be discovered by Raven which should be set forth in an

amendment to the Registration Statement or a supplement to the Proxy Statement,

Raven shall promptly inform Parent. Notwithstanding the foregoing, Raven makes

no representation or warranty with respect to any information supplied by Parent

which is contained in any of the foregoing documents.

2.20 Board Approval. The Board of Directors of Raven has, as of the date

of this Agreement, determined (i) that Merger I is fair to, and in the best

interests of Raven and its stockholders, and (ii) to recommend that the

stockholders of Raven approve this Agreement (the "Raven Recommendation").

2.21 Books and Records. The minute books of Raven and its subsidiaries

made available to counsel for Parent contain accurate summaries, in all material

respects, of all meetings of directors (or committees thereof) and stockholders

or actions by written consent since the time of incorporation of Raven or such

subsidiaries, as the case may be. The books and records of Raven accurately

reflect in all material respects the assets, liabilities, business, financial

condition and results of operations of Raven and have been maintained in

accordance with good business and bookkeeping practices.

2.22 Real Property Leases. As of the date of this Agreement, Raven does

not own any real property. Section 2.22 of the Raven Disclosure Schedule sets

forth all real property leases or subleases to or by Raven, including the term

of such lease, any extension and expansion

31

<PAGE>

options and the rent payable under it. Raven has made available to Parent true,

complete and correct copies of the leases and subleases (as amended to date)

listed in Section 2.22 of the Raven Disclosure Schedule. With respect to each

lease and sublease listed in Section 2.22 of the Raven Disclosure Schedule:

(a) the lease or sublease is legal, valid, binding, enforceable and in

full force and effect and will continue to be legal, valid, binding, enforceable

and in full force and effect immediately following the Effective Time of Merger

I in accordance with the terms thereof as in effect immediately prior to the

Effective Time of Merger I;

(b) Raven is not in material breach or violation of, or default under,

any such lease or sublease, and no event has occurred, is pending or, to the

knowledge of Raven, is threatened, which, after the giving of notice, with lapse

of time, or otherwise, would constitute a material breach or default by Raven

or, to the knowledge of Raven, any other under such lease or sublease;

(c) Raven has not assigned, transferred, conveyed, mortgaged, deeded

in trust or encumbered any interest in any lease or sublease; and

(d) there are no liens, easements, covenants or other restrictions

applicable to the real property subject to such lease, except for recorded

easements, covenants and other restrictions which do not materially impair the

intended use or the occupancy by Raven of the property subject thereto.

2.23 Insurance.

(a) Section 2.23(a) of the Raven Disclosure Schedule sets forth each

insurance policy (including fire, theft, casualty, general liability, workers

compensation, business interruption, environmental, product liability and

automobile insurance policies and bond and surety arrangements) to which Raven

is a party (the "Insurance Policies"). The Insurance Policies are in full force

and effect, maintained with reputable companies against loss relating to the

business, operations and properties and such other risks as companies engaged in

similar business as Raven would, in accordance with good business practice,

customarily insure. All premiums due and payable under the Insurance Policies

have been paid on a timely basis and Raven is in compliance in all material

respects with all other terms thereof. True, complete and correct copies of the

Insurance Policies have been made available to Parent.

(b) There are no material claims pending as to which coverage has been

questioned, denied or disputed. All material claims thereunder have been filed

in a due and timely fashion and Raven has not been refused insurance for which

it has applied or had any policy of insurance terminated (other than at its

request), nor has Raven received notice from any insurance carrier that: (i)

such insurance will be canceled or that coverage thereunder will be reduced or

eliminated; or (ii) premium costs with respect to such insurance will be

increased, other than premium increases in the ordinary course of business

applicable on their terms to all holders of similar policies.

2.24 Accounts Receivable. All accounts receivable of Raven reflected on

the Raven Balance Sheet are valid, current and collectible subject to no setoffs

or counterclaims (within

32

<PAGE>

thirty (30) days after the date on which it first became due and payable) and

without taking into account the applicable reserve for bad debts on the Raven

Balance Sheet. All accounts receivable of Raven that have arisen since the Raven

Balance Sheet Date are valid, current and collectible (within thirty (30) days

after the date on which it first became due and payable), subject to no setoffs

or counterclaims and net of a reserve for bad debts proportionate in amount to

the reserve shown on the Raven Balance Sheet.

2.25 Certain Business Practices. Neither Raven nor, to the knowledge of

Raven, any director, officer, employee or agent of Raven has: (i) used any funds

for unlawful contributions, gifts, entertainment or other unlawful payments

relating to political activity; (ii) made any unlawful payment to any foreign or

domestic government official or employee or to any foreign or domestic political

party or campaign or violated any provision of the Foreign Corrupt Practices Act

of 1977, as amended; or (iii) made any other unlawful payment.

2.26 Suppliers. Section 2.26 of the Raven Disclosure Schedule sets forth a

true, complete and correct list of each supplier that is the sole supplier of

any significant product or service to Raven. Since December 31, 2006, there has

not been: (A) any materially adverse change in the business relationship of

Raven with any supplier named in the Raven Disclosure Schedule; or (B) any

change in any material term (including credit terms) of the sales agreements or

related agreements with any supplier named in the Raven Disclosure Schedule.

2.27 Government Contracts. Raven has not been suspended or debarred from

bidding on contracts with any governmental authority, and no such suspension or

debarment has been initiated or threatened. The consummation of Merger I and

other transactions contemplated by this Agreement will not result in any such

suspension or debarment of Raven or Parent (assuming that no such suspension or

debarment will result solely from the identity of Parent).

2.28 Interested Party Transactions. Except as set forth in Section 2.28 of

the Raven Disclosure Schedule, no event has occurred during the past three years

that would be required to be reported by Raven as a Certain Relationship or

Related Transaction pursuant to Item 404 of Regulation S-K, if Raven were

required to report such information in periodic reports pursuant to the Exchange

Act.

2.29 Warrants and Indemnity Agreements. Except as set forth in Section

2.29 of the Raven Disclosure Schedule, as of the Effective Time of Merger I, all

warrants to acquire common stock of Raven shall terminate with no further

obligations binding upon Raven or the Surviving Entity as of the Effective Time

of Merger I, and neither Raven nor the Surviving Entity shall have any

liabilities with respect thereto. Except as set forth in Section 2.29 of the

Raven Disclosure Schedule, all indemnification agreements between Raven and any

individual shall have been amended and restated in substantially the form

provided to Parent.

ARTICLE 3

REPRESENTATIONS AND WARRANTIES OF PARENT AND MERGER SUBS

Each of Parent and Merger Subs hereby represents and warrants to Raven and the

Raven Stockholders as of immediately prior to the Effective Time of Merger I

that except as set forth in the

33

<PAGE>

written disclosure schedule delivered by Parent and Merger Subs to Raven (it

being understood that any such exception shall be deemed to qualify the section

or subsection of this Agreement to which it corresponds in number and each other

section or subsection to which the relevance of such disclosure is reasonably

apparent on its face) (the "Parent Disclosure Schedule"):

3.1 Organization of Parent; Merger Subs. Parent is a corporation duly

organized, validly existing and in good standing under the laws of the State of

Delaware, has all requisite corporate power and authority to own, lease and

operate its property and to carry on its business as now being conducted and as

proposed to be conducted, and is duly qualified to do business and in good

standing as a foreign corporation in each jurisdiction in which the failure to

be so qualified would have a Material Adverse Effect on Parent. Parent has made

available a true and correct copy of the Certificate of Incorporation and Bylaws

of Parent, each as amended to date, to counsel for Raven. Parent owns 100% of

the issued and outstanding shares of capital stock of Merger Sub I. Merger Sub I

is a corporation, duly organized, validly existing and in good standing under

the laws of the State of Delaware. Merger Sub I has never conducted any business

activities or operations and has never owned any property or become party to or

bound by any contract or agreement other than this Agreement. Merger Sub II is a

limited liability company, duly organized, validly existing and in good standing

under the laws of the State of Delaware. Parent owns 100% of the membership

interests of Merger Sub II. Merger Sub II has never conducted any business

activities or operations and has never owned any property or become party to or

bound by any contract or agreement other than this Agreement.

3.2 Authority.

(a) Each of Parent and Merger Subs has all requisite corporate power

and authority to enter into this Agreement and to consummate the transactions

contemplated hereby. The execution and delivery of this Agreement and the

consummation of the transactions contemplated hereby have been duly authorized

by all necessary corporate action on the part of Parent and Merger Subs, subject

only to the approval of the transactions contemplated by this Agreement by

Parent's stockholders as contemplated in Section 5.2 and the filing and

recordation of the Certificate of Merger pursuant to Delaware Law. This

Agreement has been duly executed and delivered by Parent and Merger Subs and,

assuming the due authorization, execution and delivery of this Agreement by

Raven, this Agreement constitutes the valid and binding obligation of Parent and

Merger Subs, enforceable in accordance with its terms, except as enforceability

may be limited by bankruptcy and other similar laws and general principles of

equity. The execution and delivery of this Agreement by Parent and Merger Subs

does not, and the performance of this Agreement by Parent and Merger Subs will

not, (i) conflict with or violate the Certificate of Incorporation or Bylaws of

Parent or Merger Sub I or the governing documents of Merger Sub II, (ii) subject

to obtaining the approval of the transactions contemplated by this Agreement by

Parent's stockholders as contemplated in Section 5.2 and compliance with the

requirements set forth in Section 3.2(b) below, conflict with or violate any

law, rule, regulation, order, judgment or decree applicable to Parent or Merger

Subs or by which any of its respective properties are bound or affected, or

(iii) result in any breach of or constitute a default (or an event that with

notice or lapse of time or both would become a default) under, or impair

Parent's, Merger Sub I's or Merger Sub II's rights or alter the rights or

obligations of any third party under, or give to others any rights of

termination, amendment, acceleration or cancellation of, or result in the

creation of a lien or encumbrance on any of the properties or

34

<PAGE>

assets of Parent or Merger Subs pursuant to, any note, bond, mortgage,

indenture, contract, agreement, lease, license, permit, franchise or other

instrument or obligation to which Parent or Merger Sub is a party or by which

Parent, Merger Sub I or Merger Sub II or any of its respective properties are

bound or affected, except, in the case of the provisions of this clause (iii),

for any such conflicts, violations, defaults or other occurrences that would not

have a Material Adverse Effect on Parent. Section 3.2 of the Parent Disclosure

Schedule lists all material consents, waivers and approvals under any of

Parent's agreements, contracts, licenses or leases required to be obtained in

connection with the consummation of the transactions contemplated hereby.

(b) No consent, approval, order or authorization of, or registration,

declaration or filing with any Governmental Entity is required by or with

respect to Parent or Merger Subs in connection with the execution and delivery

of this Agreement or the consummation of the transactions contemplated hereby,

except for (i) the filing of the Registration Statement with the SEC in

accordance with the Securities Act, (ii) the filing of the Certificate of Merger

with the Secretary of State of the State of Delaware, (ii) the filing of the

Proxy Statement with the SEC in accordance with the Exchange Act, (iv) the

filing of a Current Report on Form 8-K with the SEC, (v) the relisting of the

Parent Common Stock on an Approved Exchange, (vi) the filing of an amendment to

Parent's Certificate of Incorporation with the Secretary of State of the State

of Delaware, (vii) such consents, approvals, orders, authorizations,

registrations, declarations and filings as may be required under applicable

federal and state securities laws and the laws of any foreign country and (vii)

such other consents, authorizations, filings, approvals and registrations which,

if not obtained or made, would not reasonably be expected to have a Material

Adverse Effect on Raven or Parent or prevent or materially delay the

consummation of Merger I or the other transactions contemplated by this

Agreement.

3.3 Section 203 Of The Delaware General Corporation Law Not Applicable.

The Board of Directors of Parent has taken all necessary actions so that the

restrictions contained in Section 203 of the Delaware General Corporation Law

applicable to a "business combination" (as defined in Section 203) will not

apply to the execution, delivery or performance of this Agreement or to the

consummation of Merger I or the other transactions contemplated by this

Agreement.

3.4 Board Approval. The Board of Directors of Parent has, as of the date

of this Agreement, determined (i) that Merger I is fair to, and in the best

interests of Parent and its stockholders, and (ii) to recommend that the

stockholders of Parent approve this Agreement and the issuance of the Parent

Common Stock in Merger I (the "Parent Recommendation").

3.5 SEC Filings; Financial Statements.

(a) Parent has made available to Raven accurate and complete copies of

all proxy statements, Certifications (as defined below) and other statements,

reports, schedules, forms and other documents filed by Parent with the SEC since

January 1, 2005 (the "Parent SEC Documents"), other than such documents that can

be obtained on the SEC's website at www.sec.gov. As of the time it was filed

with the SEC (or, if amended or superseded by a filing prior to the date of this

Agreement, then on the date of such filing): (i) each of the Parent SEC

Documents complied in all material respects with the applicable requirements of

the Exchange Act and (ii) none of the Parent SEC Documents contained any untrue

statement of a material fact

35

<PAGE>

or omitted to state a material fact required to be stated therein or necessary

in order to make the statements therein, in the light of the circumstances under

which they were made, not misleading. The certifications and statements required

by (A) Rule 13a-14 under the Exchange Act and (B) 18 U.S.C. ss.1350 (Section 906

of the Sarbanes-Oxley Act) relating to the Parent SEC Documents (collectively,

the "Certifications") are accurate and complete and comply as to form and

content with all applicable Legal Requirements. As used in this Section 3.5, the

term "file" and variations thereof shall be broadly construed to include any

manner in which a document or information is furnished, supplied or otherwise

made available to the SEC.

(b) Parent maintains disclosure controls and procedures that satisfy

the requirements of Rule 13a-15 under the Exchange Act. Such disclosure controls

and procedures are designed to ensure that all material information concerning

Parent is made known on a timely basis to the individuals responsible for the

preparation of Parent's filings with the SEC and other public disclosure

documents.

(c) The financial statements (including any related notes) contained

or incorporated by reference in the Parent SEC Documents (the "Parent

Financials"): (i) complied as to form in all material respects with the

published rules and regulations of the SEC applicable thereto; (ii) were

prepared in accordance with GAAP (except as may be indicated in the notes to

such financial statements or, in the case of unaudited financial statements, as

permitted by the SEC, and except that the unaudited financial statements may not

contain footnotes and are subject to normal and recurring year-end adjustments

that are not reasonably expected to be material in amount) applied on a

consistent basis unless otherwise noted therein throughout the periods

indicated; and (iii) fairly present the consolidated financial position of

Parent as of the respective dates thereof and the consolidated results of

operations and cash flows of Parent for the periods covered thereby.

3.6 Capital Structure. The authorized capital stock of Parent consists of

sixty-five million (65,000,000) shares of Common Stock, par value $0.01 per

share, of which there were 33,106,523 shares issued and outstanding as of the

date of this Agreement, and twenty million (20,000,000) shares of preferred

stock, par value $0.01 per share, of which none were outstanding as of the date

of this Agreement. No shares of capital stock are held in Parent's treasury. All

outstanding shares of Parent Common Stock are duly authorized, validly issued,

fully paid and non-assessable and are not subject to preemptive rights created

by statute, the Certificate of Incorporation or Bylaws of Parent or any

agreement or document to which Parent is a party or by which it is bound, and

were issued in compliance with all applicable federal and state securities laws.

As of the date hereof, Parent had reserved an aggregate of 5,550,052 shares of

Parent Common Stock, net of exercises, for issuance to employees, consultants

and non-employee directors and directors upon exercise of options granted

("Parent Options") pursuant to Parent's Amended and Restated 1996 Stock Option

Plan, and Parent's 1998 Director's Stock Option Plan (collectively, the "Parent

Stock Option Plans"). Parent has reserved 1,664,654 shares, net of exercises,

for issuance to holders of Warrants upon their exercise. Since December 31,

2006, Parent has not issued any restricted stock units or deferred stock awards.

All shares of Parent Common Stock subject to issuance as aforesaid, upon

issuance on the terms and conditions specified in the instruments pursuant to

which they are issuable, would be duly authorized, validly issued, fully paid

and non-assessable. The shares of Parent Common Stock

36

<PAGE>

issuable as Merger Consideration, upon issuance on the terms and conditions

contemplated in this Agreement, would be duly authorized, validly issued, fully

paid and non-assessable.

3.7 Obligations With Respect To Capital Stock. Except as set forth in

Section 3.7 of the Parent Disclosure Schedule, there are no options, warrants,

equity securities, calls, rights (including preemptive rights), commitments or

agreements of any character to which Parent or any of its subsidiaries is a

party or by which it is bound obligating Parent or any of its subsidiaries to

issue, deliver or sell, or cause to be issued, delivered or sold, or to

repurchase, redeem or otherwise acquire, or cause the repurchase, redemption or

acquisition of, any shares of capital stock of Parent or any of its subsidiaries

or obligating Parent or any of its subsidiaries to grant, extend, accelerate the

vesting of or enter into any such option, warrant, equity security, call, right,

commitment or agreement. Except as set forth in the SEC Documents, there are no

registration rights and, to the knowledge of Parent, there are no voting trusts,

proxies or other agreements or understandings with respect to any equity

security of any class of Parent or with respect to any equity security of any

class of any of its subsidiaries.

3.8 Cash on Hand and No Undisclosed Liabilities. As of September 30, 2007,

Parent had $77,320,000 of cash, cash equivalents and marketable securities.

Except as disclosed in the Parent Financials, neither Parent nor any of its

subsidiaries has any liabilities (absolute, accrued, contingent or otherwise) of

a nature required to be disclosed on a balance sheet or in the related notes to

the consolidated financial statements prepared in accordance with GAAP which

are, individually or in the aggregate, material to the business, results of

operations or financial condition of Parent and its subsidiaries taken as a

whole, except liabilities (i) provided for in the Parent Financials, (ii)

liabilities incurred in connection with the transactions contemplated in this

Agreement, all of which shall be paid at or prior to the Effective Time of

Merger I out of Parent's pre-closing cash on hand, (iv) disclosed in Section 3.8

of the Parent Disclosure Schedule, or (iv) incurred since December 31, 2006 in

the ordinary course of business consistent with past practices.

3.9 Absence of Certain Changes or Events. Since December 31, 2006 through

the date of this Agreement, Parent has conducted its business only in the

ordinary course of business consistent with past practice, and there has not

been: (i) any event that has had, or that would be reasonably expected to result

in, a Material Adverse Effect on Parent, (ii) any material change by Parent in

its accounting methods, principles or practices, except as required by

concurrent changes in GAAP, (iii) any revaluation by Parent of any of its assets

having a Material Adverse Effect on Parent, (iv) writing off notes or accounts

receivable other than in the ordinary course of business, or (v) any other

action, event or occurrence that would have required the consent of Raven under

subsections (a), (c), (d), (f), (g), (i) clauses (ii) and (iv) only, (k), (l),

or (n) of Section 4.1 of this Agreement had such action, event or occurrence

taken place after the execution and delivery of this Agreement.

3.10 Taxes.

(a) Each of the Tax Returns by or with respect to Parent: (i) has been

timely filed on or before the applicable due date (including any extensions of

such due date) and (ii) is true and complete in all material respects. All

material Taxes due and payable by Parent (whether or not shown to be due on

filed Tax Returns) have been timely paid, except to the

37

<PAGE>

extent such amounts are being contested in good faith by Parent or are properly

reserved for in the Parent Financials.

(b) All material Taxes that Parent has been required to collect or

withhold have been duly collected or withheld and, to the extent required by

applicable law when due, have been duly and timely paid to the proper

Governmental Entity.

(c) There has not been any audit, examination or other administrative

or court proceeding for or relating to any liability in respect of Taxes by any

Governmental Entity in respect of which Parent has received a written notice,

and Parent has not been notified in writing by any Governmental Entity that any

such audit, examination or other administrative or court proceeding involving

Taxes is contemplated or pending. No extension of time with respect to any date

on which a Tax Return was required to be filed by Parent is in force (except

where such Tax Return was filed), and no waiver or agreement by or with respect

to Parent is in force for the extension of time for the payment, collection or

assessment of any Taxes, and no request has been made by Parent in writing for

any such extension or waiver (except, in each case, in connection with any

request for extension of time for filing Tax Returns). No claim has been made in

writing to Parent by any Governmental Entity in a jurisdiction where Parent does

not file Tax Returns that Parent is subject to taxation by that jurisdiction

and, to Parent's knowledge, there are no facts or basis upon which any such

claim could reasonably be made. No issues relating to any material amount of

Taxes were raised by the relevant Governmental Entity in any completed audit or

examination that would reasonably be expected to recur in a later taxable

period.

(d) The unpaid Taxes of Parent did not, as of the date of Parent's

audited financial statements for the fiscal year ended December 31, 2006, exceed

the reserve for Tax liability (excluding any reserve for deferred Taxes

established to reflect timing differences between book and Tax items) set forth

on the face of the balance sheet contained in such audited financial statements.

Since the date of the most recent audited financial statements, Parent has not

incurred any liability for Taxes outside of the ordinary course of business or

otherwise inconsistent with past custom or practice.

(e) There are no liens for Taxes on any asset of Parent other than

liens for Taxes not yet due and payable or not yet delinquent.

(f) Parent has not agreed, or will not be required, to make any

adjustment for any period after the date of this Agreement pursuant to Section

481(a) of the Code by reason of any change in any accounting method made prior

to the date hereof. There is no application pending with any Governmental Entity

requesting permission for any such change in any accounting method of Parent,

and the Internal Revenue Service has not issued in writing any pending proposal

regarding any such adjustment or change in accounting method.

(g) No closing agreements, private letter rulings, technical advice

memoranda or similar agreements or rulings have been entered into by Parent with

any taxing authority or issued by any taxing authority to Parent. There are no

outstanding rulings of, or request for rulings with, any Governmental Entity

addressed to Parent that are, or if issued would be, binding on Parent.

38

<PAGE>

(h) Parent is not a party to any agreement with any third party

relating to allocating or sharing the payment of, or liability for, Taxes or Tax

benefits. Parent has no liability for the Taxes of any third party under

Treasury Regulation ss.1.1502-6 (or any similar provision of state, local or

foreign law) as a transferee or successor, by contract or otherwise (other than

entities for which Parent is or was the common parent).

(i) Parent is not a member of an affiliated group of corporations

within the meaning of Section 1504 of the Code or of any group that has filed a

combined, consolidated or unitary Tax return under state, local or foreign Tax

law (other than a group the common parent of which is Parent).

(j) Parent does not (i) own a single member limited liability company

which is treated as a disregarded entity, and (ii) is not a stockholder of a

"controlled foreign corporation" as defined in Section 957 of the Code.

(k) Parent has not participated in a "listed transaction" within the

meaning of Treasury Regulation Section 1.6011-4(b). Parent believes it has

substantial authority for or has disclosed on its respective United States

federal income Tax Returns all positions taken therein that could give rise to a

substantial understatement of United States federal income Tax within the

meaning of Section 6662 of the Code.

(l) Parent is not (and has not been for the five-year period ending at

Closing) a "United States real property holding corporation" as defined in

Section 897(c)(2) of the Code and the applicable Treasury Regulations.

(m) Parent does not have a permanent establishment in any country

other than the United States, as defined in any applicable Tax treaty between

the United States and such other country.

3.11 Intellectual Property.

(a) No party is overtly challenging in writing the right, title or

interest of Parent in, to or under the material IP Rights owned by or

exclusively licensed to Parent, or the validity, enforceability or claim

construction of any Patent Rights owned or co-owned or exclusively licensed to

Parent, and there is no opposition, cancellation, proceeding, objection or claim

pending with regard to any material IP Rights owned by or exclusively licensed

to Parent.

(b) To the knowledge of Parent, as of the date of this Agreement, no

material IP Rights owned by or exclusively licensed to Parent are being

infringed or misappropriated by any third party.

(c) Neither the execution, delivery or performance of this Agreement

by Parent nor the consummation by Parent of the transactions contemplated by

this Agreement will contravene, conflict with or result in any limitation on

Parent's right, title or interest in or to any material IP Rights.

39

<PAGE>

3.12 Compliance; Permits; Restrictions.

(a) Except for any conflicts, defaults or violations which would not

reasonably be expected to have a Material Adverse Effect on Parent, neither

Parent nor any of its subsidiaries is in conflict with, or in default or

violation of (i) any law, rule, regulation, order, judgment or decree applicable

to Parent or any of its subsidiaries or by which its or any of their respective

properties is bound or affected, or (ii) any note, bond, mortgage, indenture,

contract, agreement, lease, license, permit, franchise or other instrument or

obligation to which Parent or any of its subsidiaries is a party or by which

Parent or any of its subsidiaries or its or any of their respective properties

is bound or affected. No investigation or review by any governmental or

regulatory body or authority is pending or, to the knowledge of Parent,

threatened against Parent or its subsidiaries, nor, to Parent's knowledge, has

any governmental or regulatory body or authority indicated an intention to

conduct the same.

(b) There are no biological and drug products being manufactured,

distributed or developed by or on behalf of Parent that are subject to the

jurisdiction of th


 
SITE SEARCH

AGREEMENTS / CONTRACTS

Document Title:

Entire Document: (optional)

Governing Law:(optional)


Try our advanced search >>
 

CLAUSES

Search Contract Clauses >>

Browse Contract Clause Library>>

Get Email Updates
Email:
This is only a partial view of this document. We have millions of legal documents and clauses drafted by top law firms. learn more search for free browse for free learn more