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EXHIBIT 2.1 ASSIGNMENT AND LICENSE AGREEMENT

IP Intellectual Property License Assignment Agreement

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WYETH HOLDINGS CORPORATION | NEUROCRINE BIOSCIENCES, INC.

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Title: EXHIBIT 2.1 ASSIGNMENT AND LICENSE AGREEMENT
Governing Law: New York     Date: 3/17/2004
Industry: BIOTRX    

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                                                                    EXHIBIT 2.1

 

CERTAIN MATERIAL (INDICATED BY AN ASTERISK) HAS BEEN OMITTED FROM THIS DOCUMENT

PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT. THE OMITTED MATERIAL HAS BEEN

FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.

 

                        ASSIGNMENT AND LICENSE AGREEMENT

 

                                 BY AND BETWEEN

 

                           WYETH HOLDINGS CORPORATION

 

                                       AND

 

                          NEUROCRINE BIOSCIENCES, INC.

 

                                FEBRUARY 26, 2004

 

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                                TABLE OF CONTENTS

 

<TABLE>

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                                                                                     PAGE

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<S>                                                                                  <C>

1.    DEFINITIONS...............................................................      2

   1.1      "Affiliate".........................................................      2

   1.2      "Amended and Restated License Agreement"............................      2

   1.3      "Assignment and Assumption Agreement"...............................      2

   1.4      "Closing"...........................................................      2

   1.5      "Closing Date"......................................................      2

   1.6      "Compound"..........................................................      2

   1.7      "Compound License Agreement"........................................      2

   1.8      "Compound Patent"...................................................      3

   1.9      "Confidential Information"..........................................      3

   1.10     "Control" or "Controlled"...........................................      3

   1.11     "Effective Date"....................................................      3

   1.12     "HSR Act"...........................................................      3

   1.13     "HSR Filing"........................................................      3

   1.14     "HSR Clearance Date"................................................      3

   1.15     "Neurocrine Sublicense Agreement"...................................      3

   1.16     "Original License Agreement"........................................      3

   1.17     "Pfizer Collaboration Agreement"....................................      4

   1.18     "Pfizer Sublicense Agreement".......................................      4

   1.19     "Share Price".......................................................      4

   1.20     "Stock Purchase Agreement"..........................................      4

   1.21     "Territory".........................................................      4

   1.22     "Third Party".......................................................      4

   1.23     "Wyeth Intellectual Property".......................................      4

   1.24     "2002 Consent Agreement"............................................      4

   1.25     "2004 Consent Agreement"............................................      4

2.    ASSIGNMENT OF RIGHTS......................................................      5

   2.1      Assignment..........................................................      5

   2.2      Assumption..........................................................      5

   2.3      No Continuing Obligations...........................................      5

   Assignment and Assumption Agreement..........................................      6

3.    LICENSES..................................................................      6

   3.1      Exclusive License...................................................      6

   3.2      Retained Rights; No Implied Licenses................................      6

   3.3      Sublicensing........................................................      6

   3.4      Section 365(n) of the Bankruptcy Code...............................      7

4.    CONSIDERATION.............................................................      7

   4.1      Cash Payments.......................................................      7

   4.2      Equity Payment......................................................      7

   4.3      No Other Payments...................................................      8

   4.4      Taxes and Withholding...............................................      8

</TABLE>

 

                                     Page i

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<TABLE>

<S>                                                                                  <C>

5.    THE CLOSING...............................................................      8

   5.1      Closing Date........................................................      8

   5.2      Deliveries by Neurocrine............................................      8

   5.3      Deliveries by Wyeth.................................................      9

6.    CONDITIONS and covenants..................................................     10

   6.1      Conditions to Obligations of Each Party.............................     10

   6.2      Conditions to Obligations of Wyeth..................................     10

   6.3      Conditions to Obligations of Neurocrine.............................     11

   6.4      Covenants...........................................................     11

7.    REPRESENTATIONS AND WARRANTIES............................................     11

   7.1      Representations and Warranties of Each Party........................     11

   7.2      Additional Representations and Warranties of Wyeth..................     12

   7.3      Additional Representations and Warranties by Neurocrine.............     14

   7.4      Representation by Legal Counsel.....................................     15

   7.5      No Inconsistent Agreements..........................................     15

8.    CONFIDENTIALITY...........................................................     15

   8.1      Non-Disclosure and Use Restrictions.................................     15

   8.2      SEC Filings.........................................................     16

   8.3      Public Statements...................................................     16

9.    TERM AND TERMINATION......................................................     16

   9.1      Government Approvals................................................     16

      9.1.1       HSR Filing....................................................     16

      9.1.2       Other Government Approvals....................................     17

   9.2      Termination by Mutual Agreement.....................................     17

   9.3      Termination for Cause...............................................     17

   9.4      Effects of Termination..............................................     17

10.   INDEMNIFICATION AND INSURANCE.............................................     18

   10.1     Indemnification by Neurocrine.......................................     18

   10.2     Indemnification by Wyeth............................................     19

   10.3     Procedure...........................................................     19

   10.4     Insurance...........................................................     20

   10.5     Limitation..........................................................     20

11.   MISCELLANEOUS.............................................................     20

   11.1     Assignment..........................................................     20

   11.2     Further Actions.....................................................     21

   11.3     Notices.............................................................     21

   11.4     Amendment...........................................................     22

   11.5     Waiver..............................................................     22

   11.6     Severability........................................................     22

   11.7     Descriptive Headings................................................     22

   11.8     Governing Law; Dispute Resolution...................................     22

   11.9     Entire Agreement of the Parties.....................................     23

   11.10       Independent Contractors..........................................     23

   11.11       Counterparts.....................................................     24

</TABLE>

 

Exhibit 1.7       Form of Compound License Agreement

 

                                     Page ii

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Exhibit 1.20      Form of Stock Purchase Agreement

Exhibit 1.23      Wyeth Patents

Exhibit 2.1       Form of Assignment and Assumption Agreement

Exhibit 2.4       Form of Patent Assignment

Exhibit 8.3       Press Release

 

                                    Page iii

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                        ASSIGNMENT AND LICENSE AGREEMENT

 

         This Assignment and License Agreement (the "Agreement") is entered into

on this 26th day of February, 2004 (the "Signature Date") by and between Wyeth

Holdings Corporation (formerly known as "American Cyanamid Company"), a Maine

corporation, having a place of business at 5 Giralda Farms, Madison, New Jersey

07940 (hereinafter "Wyeth") and Neurocrine Biosciences, Inc., a Delaware

corporation, having a place of business at 10555 Science Center Drive, San

Diego, California 92121 (hereinafter, "Neurocrine"). Wyeth and Neurocrine may

each be referred to herein individually as a "Party" and collectively as the

"Parties".

 

         WHEREAS, Wyeth and DOV Pharmaceutical, Inc. (hereinafter "DOV") entered

into that certain license agreement, dated May 28, 1998 (hereinafter, the

"Original License Agreement"), pursuant to which Wyeth, inter alia, granted to

DOV an exclusive license, under certain patent rights and know-how, with respect

to several compounds, including the Compound (as defined below);

 

         WHEREAS, DOV and Neurocrine entered into a Sublicense and Development

Agreement dated June 30, 1998 (as amended from time to time, the "Neurocrine

Sublicense Agreement"), pursuant to which DOV sublicensed to Neurocrine the

rights relating to the Compound licensed to DOV under the Original License

Agreement;

 

         WHEREAS, Neurocrine and Pfizer, Inc. (hereinafter, "Pfizer") entered

into (i) that certain license agreement dated December 18, 2002 (as amended from

time to time, the "Pfizer Sublicense Agreement") pursuant to which Neurocrine,

inter alia, sublicensed to Pfizer the rights relating to the Compound licensed

to Neurocrine under the Neurocrine Sublicense Agreement and (ii) that certain

collaboration agreement dated December 18, 2002 (as amended from time to time,

the "Pfizer Collaboration Agreement") pursuant to which Neurocrine and Pfizer,

inter alia, will copromote the Compound in the United States;

 

         WHEREAS, Wyeth, DOV and Neurocrine entered into that certain Consent

and Agreement dated December 13, 2002 (the "2002 Consent Agreement") in order to

facilitate the grant by Neurocrine to Pfizer of certain rights under the Pfizer

Sublicense Agreement;

 

         WHEREAS, Neurocrine now desires to obtain from Wyeth and Wyeth now

desires to grant to Neurocrine: (i) an assignment of (x) all of Wyeth's rights

and obligations under the Compound License Agreement (as defined below), and (y)

Wyeth's rights and obligations under the 2002 Consent Agreement to the extent

such rights and obligations relate to the Compound and (z) the Compound Patent

(as defined below) and (ii) an exclusive license under the Wyeth Intellectual

Property (as defined below), to make, have made, use and sell the Compound

(which license rights are subject to the rights and licenses granted to DOV

under the Compound License Agreement);

 

                                  Page 1 of 24

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         WHEREAS, on or before the Closing (as defined below), Wyeth and DOV

will enter into: (i) an amended and restated license agreement, pursuant to

which the Original License Agreement will be amended to delete therefrom all

rights and obligations of each of Wyeth and DOV with respect to the Compound

(the "Amended and Restated License Agreement"), and (ii) the Compound License

Agreement, setting forth the rights and obligations of each of Wyeth and DOV

solely as they relate to the Compound; and

 

         WHEREAS, Wyeth, DOV and Neurocrine entered into that certain Consent

Agreement and Amendment, dated February 25, 2004 (the "2004 Consent Agreement")

pursuant to which, inter alia, DOV has provided its consent for Wyeth to enter

into and perform this Agreement.

 

         NOW THEREFORE, in consideration of the foregoing premises and the

promises, mutual covenants and obligations set forth below, and other good and

valuable consideration, the Parties agree as follows:

 

1.       DEFINITIONS.

 

         1.1      "AFFILIATE" shall mean, with respect to any person or entity,

                  any other person or entity which controls, is controlled by or

                  is under common control with such person or entity. A person

                  or entity shall be regarded as in control of another entity if

                  it owns or controls at least fifty percent (50%) of the equity

                  securities of the subject entity entitled to vote in the

                  election of directors (or, in the case of an entity that is

                  not a corporation, for the election of the corresponding

                  managing authority), provided, however, that the term

                  "Affiliate" shall not include subsidiaries or other entities

                  in which a Party or its Affiliates owns a majority of the

                  ordinary voting power necessary to elect a majority of the

                  board of directors or other governing board, but is restricted

                  from electing such majority by contract or otherwise, until

                  such time as such restrictions are no longer in effect.

 

         1.2      "AMENDED AND RESTATED LICENSE AGREEMENT" shall have the

                  meaning set forth in the preamble of this Agreement.

 

         1.3      "ASSIGNMENT AND ASSUMPTION AGREEMENT" shall have the meaning

                  set forth in Section 2.1 hereof.

 

         1.4      "CLOSING" shall have the meaning set forth in Section 5.1

                  hereof.

 

         1.5      "CLOSING DATE" shall have the meaning set forth in Section 5.1

                  hereof.

 

         1.6      "COMPOUND" shall mean the chemical compound identified in the

                  License Agreement as CL 285,489, which compound is also known

                  as indiplon.

 

         1.7      "COMPOUND LICENSE AGREEMENT" shall mean the license agreement

 

                                  Page 2 of 24

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                  relating solely to the Compound, which license agreement is to

                  be entered into by and between Wyeth and DOV upon their

                  amendment and restatement of the Original License Agreement as

                  described above in the preamble to this Agreement. The

                  Compound License Agreement shall be in the form attached

                  hereto as Exhibit 1.7.

 

         1.8      "COMPOUND PATENT" shall mean United States Patent 6,399,621

                  granted on June 4, 2002, which patent claims the Compound.

 

         1.9      "CONFIDENTIAL INFORMATION" shall mean, with respect to a

                  Party, all non-public proprietary data or information that is

                  disclosed by such Party to the other Party in connection with

                  this Agreement or information designated as "Confidential

                  Information" of such Party hereunder.

 

         1.10     "CONTROL" OR "CONTROLLED" shall mean, with respect to any (a)

                  item of information or know-how, or (b) intellectual property

                  right, the possession (whether by ownership or license, other

                  than pursuant to this Agreement) by a Party of the ability to

                  grant to the other Party access and/or a license as provided

                  herein under such item or right without violating the terms of

                  any agreement with any Third Party existing as of the date

                  such Party is obligated under this Agreement to grant such

                  access and/or license.

 

         1.11     "EFFECTIVE DATE" shall mean, upon completion of the Closing,

                  the Closing Date.

 

         1.12     "HSR ACT" shall mean the Hart-Scott-Rodino Antitrust

                  Improvements Act of 1976, as amended, and the rules and

                  regulations promulgated thereunder.

 

         1.13     "HSR FILING" shall mean filings by Wyeth and Neurocrine with

                  the United States Federal Trade Commission and the Antitrust

                  Division of the United States Department of Justice of a

                  Notification and Report Form for Certain Mergers and

                  Acquisitions (as that term is defined in the HSR Act) with

                  respect to the matters set forth in this Agreement and in the

                  Stock Purchase Agreement, as applicable, together with all

                  required documentary attachments thereto.

 

         1.14     "HSR CLEARANCE DATE" shall mean the earliest date on which the

                  Parties have actual knowledge that all applicable waiting

                  periods under the HSR Act with respect to the transactions

                  contemplated hereunder have expired or have been terminated.

 

         1.15     "NEUROCRINE SUBLICENSE AGREEMENT" shall have the meaning set

                  forth above in the preamble of this Agreement.

 

         1.16     "ORIGINAL LICENSE AGREEMENT" shall have the meaning set forth

                  above in

 

                                  Page 3 of 24

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                  the preamble of this Agreement.

 

         1.17     "PFIZER COLLABORATION AGREEMENT" shall have the meaning set

                  forth above in the preamble of this Agreement.

 

         1.18     "PFIZER SUBLICENSE AGREEMENT" shall have the meaning set forth

                  above in the preamble of this Agreement.

 

         1.19     "SHARE PRICE" shall mean the price per share for common stock

                  of Neurocrine calculated in accordance with the Stock Purchase

                  Agreement.

 

         1.20     "STOCK PURCHASE AGREEMENT" shall mean that certain stock

                  purchase agreement to be entered into by Neurocrine and Wyeth

                  (or one of Wyeth's Affiliates designated by Wyeth) on the

                  Closing Date, which agreement shall be in the form attached

                  hereto as Exhibit 1.20.

 

         1.21     "TERRITORY" shall mean all countries of the world.

 

         1.22     "THIRD PARTY" shall mean any person or entity other than

                  Wyeth, Neurocrine or any of their respective Affiliates.

 

         1.23     "WYETH INTELLECTUAL PROPERTY" shall mean (a) that Wyeth

                  know-how consisting of all information, patentable or

                  otherwise, developed, applied, or acquired by Wyeth as of

                  [***] relating to the production or development of the

                  Compound, which information is reasonably useful or necessary

                  to develop or manufacture the Compound and (b) those patents

                  and patent applications Controlled by Wyeth that claim the

                  Compound or the manufacture or use thereof, which patents and

                  patent applications are listed on Exhibit 1.23 attached

                  hereto, and including all continuations,

                  continuations-in-part, divisionals, re-issues,

                  re-examinations, extensions, substitutions, patents of

                  addition, and supplementary certificates (or equivalents

                  thereof) of any such patents and patent applications and all

                  foreign counterparts thereof, in each case, only to the extent

                  that they claim or would otherwise be infringed by the

                  manufacture, use or sale of the Compound, provided, however,

                  that the Wyeth Intellectual Property shall not include the

                  Compound Patent. [***]

 

         1.24     "2002 CONSENT AGREEMENT" shall have the meaning set forth in

                  the preamble of this Agreement.

 

         1.25     "2004 CONSENT AGREEMENT" shall have the meaning set forth in

                  the preamble of this Agreement.

 

*** Certain information on this page has been omitted and filed separately with

the Commission. Confidential treatment has been requested with respect to the

omitted portions.

 

                                  Page 4 of 24

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2.       ASSIGNMENT OF RIGHTS.

 

         2.1      ASSIGNMENT. Subject to the terms and conditions set forth in

                  this Agreement, and in consideration for the payment to be

                  made by Neurocrine to Wyeth under Section 4.1 hereof and the

                  transactions contemplated by the Stock Purchase Agreement in

                  accordance with Section 4.2 hereof, Wyeth hereby agrees to

                  assign, and shall assign at the Closing, to Neurocrine: (i)

                  all of Wyeth's rights and obligations under the Compound

                  License Agreement, and (ii) Wyeth's rights and obligations

                  under the 2002 Consent Agreement only to the extent such

                  rights and obligations relate to the Compound, and (iii) all

                  of Wyeth's right, title and interest in and to the Compound

                  Patent (all of which rights being so assigned are subject to

                  the rights and licenses granted to DOV under the Compound

                  License Agreement and granted to Neurocrine, DOV and

                  Neurocrine's sublicensee under the 2002 Consent Agreement).

                  Such assignments shall be contingent upon and become effective

                  only upon completion of the Closing and shall be made pursuant

                  to the Assignment and Assumption Agreement substantially in

                  the form attached hereto as Exhibit 2.1, to be executed and

                  delivered by the Parties and DOV at the Closing (the

                  "Assignment and Assumption Agreement").

 

         2.2      ASSUMPTION. Subject to the terms and conditions set forth in

                  this Agreement, Neurocrine hereby agrees to assume: (i) all of

                  Wyeth's rights and obligations under the Compound License

                  Agreement, and (ii) Wyeth's rights and obligations under the

                  2002 Consent Agreement only to the extent such rights and

                  obligations relate to the Compound. Additionally, Neurocrine

                  as of the Closing and thereafter shall have the sole and

                  exclusive right, at its own expense, for the continued

                  maintenance and enforcement of the Compound Patent, subject

                  only to the obligations so assumed by Neurocrine and the

                  rights and licenses granted to DOV under the Compound License

                  Agreement. Neurocrine's assumption of such rights and

                  obligations shall be contingent upon and become effective only

                  upon completion of the Closing and shall be made pursuant to

                  the Assignment and Assumption Agreement.

 

         2.3      NO CONTINUING OBLIGATIONS. Neurocrine agrees that, upon

                  completion of the Closing and thereafter, Wyeth shall have no

                  further or continuing rights or obligations (a) with respect

                  to the Compound Patent, (b) under the Compound License

                  Agreement, or (c) under the 2002 Consent Agreement, to the

                  extent that any such obligations relate solely to the

                  Compound. Notwithstanding the foregoing, Wyeth agrees that it

                  will at all times remain obligated under the 2002 Consent

                  Agreement as and only to the extent that Wyeth is and remains

                  the owner and licensor (to Neurocrine, DOV or Neurocrine's

                  Approved Sublicensee) of the Wyeth Know-How and Wyeth Patents

                  (as such terms are defined in the Compound License Agreement,

                  but not including the Compound Patent).

 

                                  Page 5 of 24

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         2.4      ASSIGNMENT AND ASSUMPTION AGREEMENT. On the Effective Date or

                  such later date as may be mutually agreed to by the Parties,

                  Wyeth, after having received the payment due from Neurocrine

                  under Section 4.1 and the shares of Neurocrine common stock

                  and payments to be transferred and delivered to Wyeth in

                  accordance with Section 4.2 hereof and the Stock Purchase

                  Agreement, shall execute and deliver to Neurocrine the

                  Assignment and Assumption Agreement. Additionally, at such

                  time, Wyeth shall execute and deliver to Neurocrine the Patent

                  Assignment, substantially in the form attached hereto as

                  Exhibit 2.4 (the "Patent Assignment") and such other documents

                  that Neurocrine may reasonably require in order to record the

                  assignment to Neurocrine of the Compound Patent in the U.S.

                  Patent Office and/or any foreign patent office and to record

                  the assignment to Neurocrine of the Compound License Agreement

                  and/or the 2002 Consent Agreement in any governmental office

                  and/or as otherwise necessary or useful to perfect the rights

                  being assigned to Neurocrine hereunder.

 

3.       LICENSES.

 

         3.1      EXCLUSIVE LICENSE. Effective as of, and only upon, the

                  completion of the Closing, Wyeth hereby grants to Neurocrine

                  an exclusive, fully-paid, royalty free, perpetual, irrevocable

                  license under the Wyeth Intellectual Property, solely to make,

                  have made, use, import, offer for sale and/or sell

                  pharmaceutical products containing the Compound in the

                  Territory subject to the licenses granted to DOV pursuant to

                  the Compound License Agreement.

 

         3.2      RETAINED RIGHTS; NO IMPLIED LICENSES. Except for the license

                  expressly granted to Neurocrine in Section 3.1 above, Wyeth

                  retains all right, title and interest under the Wyeth

                  Intellectual Property and shall have the right to practice and

                  use the Wyeth Intellectual Property for any purpose without

                  any obligation to Neurocrine, subject to the rights and

                  licenses granted by Wyeth to DOV under the Compound License

                  Agreement and by Wyeth to DOV, Neurocrine and/or Neurocrine's

                  sublicensee under the 2002 Consent Agreement. The Parties

                  expressly agree that, under this Agreement, Neurocrine shall

                  have no right, title or interest, either express or implied,

                  in or to any patent, patent application or other intellectual

                  property right owned or controlled by Wyeth or any of Wyeth's

                  Affiliates, except for the license rights expressly granted in

                  Section 3.1 above.

 

         3.3      SUBLICENSING. Subject to and to the extent not in

                  contravention of the rights and licenses granted to DOV under

                  the Compound License Agreement, Neurocrine may grant to one or

                  more Third Parties sublicenses of the rights granted to it

                  under Section 3.1 hereof at any time. Each such sublicense

                  shall be subject and subordinate to, and consistent with, the

                  terms and conditions of this Agreement, and shall provide that

                  any such sublicensee shall not further sublicense except on

                  terms

 

                                  Page 6 of 24

<PAGE>

 

                  consistent with this Section 3.3. Neurocrine shall provide

                  Wyeth with a copy of any sublicense granted pursuant to this

                  Section 3.3 within thirty (30) days after the execution

                  thereof. Neurocrine shall remain responsible for the

                  performance of its sublicensees, and shall ensure that any

                  such sublicensees comply with the relevant provisions of this

                  Agreement.

 

         3.4      SECTION 365(n) OF THE BANKRUPTCY CODE. All rights and licenses

                  granted under or pursuant to any Section of this Agreement

                  are, and shall otherwise be deemed to be, for purposes of

                  Section 365(n) of the Bankruptcy Code, licenses of rights to

                  "intellectual property" as defined under Section 101 (35A) of

                  the Bankruptcy Code. The Parties shall retain and may fully

                  exercise all of their respective rights and elections under

                  the Bankruptcy Code.

 

4.       CONSIDERATION.

 

         4.1      CASH PAYMENTS. In partial consideration for the rights and

                  obligations assigned to Neurocrine under Article 2 hereof and

                  the licenses granted to Neurocrine under Article 3 hereof, and

                  subject to the terms and conditions of this Agreement,

                  Neurocrine shall pay to Wyeth :

 

                  (a)      the non-creditable sum of Five Million Dollars

                           ($5,000,000.00) (the "Initial Fee"), which amount

                           shall be payable within two (2) business days of the

                           Signature Date and shall be non-refundable except as

                           otherwise expressly set forth in Section 9.4 hereof;

                           and

 

                  (b)      the non-refundable, non-creditable sum of Forty-Five

                           Million Dollars ($45,000,000.00) which amount shall

                           be payable at the Closing.

 

                  Such payments shall be made in United States Dollars by wire

                  transfer of immediately available funds to a bank account of

                  Wyeth or one of Wyeth's Affiliates, which bank account is

                  designated in writing by Wyeth to Neurocrine.

 

         4.2      EQUITY PAYMENT. In further consideration for the rights and

                  obligations assigned to Neurocrine under Article 2 hereof and

                  the licenses granted to Neurocrine under Article 3 hereof,

                  Neurocrine, at the Closing and in accordance with the terms

                  and conditions of the Stock Purchase Agreement, shall

                  irrevocably transfer and deliver to Wyeth or, at Wyeth's

                  election, one of Wyeth's Affiliates, (i) that number of shares

                  of Neurocrine common stock that, based on the Share Price, has

                  a value of Forty-Five Million Dollars ($45,000,000.00), as

                  such amount may be adjusted in accordance with the terms and

                  conditions of the Stock Purchase Agreement and (ii) if

                  applicable, that amount of cash which may be due in accordance

                  with the terms and conditions of the Stock Purchase Agreement

                  as a result of any adjustment made to the number of shares of

 

                                  Page 7 of 24

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                  Neurocrine common stock to be transferred and delivered to

                  Wyeth pursuant to the Stock Purchase Agreement.

 

         4.3      NO OTHER PAYMENTS. Upon receipt by Wyeth of the payment

                  required under Section 4.1 above and the Neurocrine common

                  stock to be delivered to Wyeth in accordance with Section 4.2

                  above and the terms and conditions of the Stock Purchase

                  Agreement, Neurocrine, except as provided in Article 10 below,

                  shall have no further obligation to make any payments to Wyeth

                  in connection with the assignment of rights and obligations

                  hereunder, the grant of licenses to Neurocrine hereunder

                  and/or the development and/or commercialization of the

                  Compound or pharmaceutical products containing the Compound,

                  and the licenses granted to Neurocrine under Section 3.1 shall

                  thereafter be fully paid up and royalty free.

 

         4.4      TAXES AND WITHHOLDING. All payments under this Agreement will

                  be made without any deduction or withholding for or on account

                  of any tax unless such deduction or withholding is required by

                  applicable laws or regulations. If Neurocrine is so required

                  to deduct or withhold, Neurocrine will (a) promptly notify

                  Wye

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