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PATENT AND KNOW HOW LICENSE Relating to the development, registration and sale of TROXATYL(R)

Patent License Agreement

PATENT AND KNOW HOW LICENSE
        Relating to the development, registration and sale of TROXATYL(R) | Document Parties: SGX PHARMACEUTICALS, INC. | TANAUD INTERNATIONAL B.V. | TANAUD IRELAND INC. | SHIRE BIOCHEM INC. You are currently viewing:
This Patent License Agreement involves

SGX PHARMACEUTICALS, INC. | TANAUD INTERNATIONAL B.V. | TANAUD IRELAND INC. | SHIRE BIOCHEM INC.

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Title: PATENT AND KNOW HOW LICENSE Relating to the development, registration and sale of TROXATYL(R)
Governing Law: New York     Date: 1/4/2006
Industry: Biotechnology and Drugs    

PATENT AND KNOW HOW LICENSE
        Relating to the development, registration and sale of TROXATYL(R), Parties: sgx pharmaceuticals  inc. , tanaud international b.v. , tanaud ireland inc. , shire biochem inc.
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                                                                   EXHIBIT 10.16

                                           *** TEXT OMITTED AND FILED SEPARATELY
                                    PURSUANT TO A CONFIDENTIAL TREATMENT REQUEST
                                             UNDER 17 C.F.R. SECTION 200.80(b)(4)
                                               AND RULE 406 UNDER THE SECURITIES
                                                         ACT OF 1933, AS AMENDED


                                   23 JULY 2004



                           PATENT AND KNOW HOW LICENSE


                                     BETWEEN


                               SHIRE BIOCHEM INC.

                               TANAUD IRELAND INC.

                             TANAUD INTERNATIONAL B.V.


                                       AND


                            STRUCTURAL GENOMIX, INC.






                    ----------------------------------------

                           PATENT AND KNOW HOW LICENSE
        Relating to the development, registration and sale of TROXATYL(R)

                    ----------------------------------------


<PAGE>


PATENT AND KNOW HOW LICENSE

DATE:     23 JULY 2004

PARTIES:

(1)   SHIRE BIOCHEM INC., a company incorporated in Canada, whose address is 275
     boul. Armand-Frappier, Laval, QC, Canada H7V 4A7 ("SHIRE BIOCHEM");

(2)   TANAUD IRELAND INC., a company incorporated in Ireland, whose address is
     Shannon Airport House, Shannon, County Clare, Ireland ("TANAUD IRELAND");

(3)   TANAUD INTERNATIONAL B.V., a company incorporated in the Netherlands, whose
     address is Fred Roeskestraat 123, First Floor, 1076 EE Amsterdam, The
     Netherlands ("TANAUD BV"); and

(4)   STRUCTURAL GENOMIX, INC., a company incorporated in Delaware, whose address
     is 10505 Roselle Street, San Diego, CA 92121, U.S.A. ("LICENSEE").

BACKGROUND

(A)   Shire BioChem (formerly BioChem Pharma Inc.) is a pharmaceutical company
     engaged in, among other things, the research and development of certain
     pharmaceutical products including the Licensed Product (as defined below).

(B)   During the course of its research and development of the Licensed Product,
     Shire BioChem generated the Compound Patents, the Background Patents and
     the Shire Know-How (each defined below) in connection with the Licensed
     Product.

(C)   On 3 January 1996, Shire BioChem entered into the License Agreement (as
     defined below) which, among other things, granted Shire BioChem the
     exclusive right to use the University Patents (as defined below).

(D)   The Licensee is engaged in, among other things, the research and
     development of certain pharmaceutical products.

(E)   The Licensee has requested, and Shire agrees to grant, an exclusive license
     to make, have made, use, supply and sell the Licensed Product in the
     Territory (as defined below) on the terms and conditions set out in this
     Agreement.

OPERATIVE PROVISIONS

1.    INTERPRETATION

1.1   In this Agreement:



                                        2


<PAGE>


         "ACCELERATED APPROVAL" means approval for Marketing Authorisation of
         the Licensed Product in the United States of America on the basis of an
         application made to the FDA pursuant to the Code of Federal
         Regulations, Title 21, Part 314 (subpart H - accelerated approval of
         new drugs for serious or life threatening illnesses) or its equivalent
         in any jurisdiction;

         "AFFILIATE" means any firm, person or company which controls, is
         controlled by or is under common control with a Party to this Agreement
         and for the purpose of this definition the term "control" means the
         possession, directly or indirectly, of the power to direct or cause the
         direction of the management and policies of such firm, person or
         company, whether through the ownership of voting securities, by
         contract or otherwise or the ownership either directly or indirectly of
         more than 50% of the voting securities of such firm, person or company;

         "BACKGROUND PATENTS" means the patents and patent applications owned by
         or licensed to Shire Biochem, Tanaud Ireland or Tanaud BV as set out in
         Part I of Schedule 2;

          "BUSINESS DAY" means any day other than Saturday or Sunday on which the
         banks in New York are open for business;

         "CANADIAN TERRITORY" means Canada;

         "CHANGE OF CONTROL" means a transaction or series of related
         transactions (other than an equity financing the principal purpose of
         which is to raise new capital for the Licensee or an IPO or follow-on
         public offering), that result directly or indirectly in the change of:

         (a)       control of more than half of the voting power of the issued
                  share capital of the Licensee; or

         (b)       control of more than half of the issued share capital
                  (excluding any part thereof which carries no right to
                   participate beyond a specified amount in the distribution of
                  either profit or capital) of the Licensee; or

         (c)       control of the power to direct or cause the direction of the
                  management and policies of the Licensee, by virtue of any
                  power conferred under the articles of association or other
                  documents relating to the Licensee;

         "CLAIMS" shall have the meaning given in clause 14.1;

         "CLINICAL PROOF OF CONCEPT" means either (a) completion of the
         [...***...] patient phase II study of the Compound [...***...] Acute
         Myelogenous Leukemia (AML) patients with a complete response rate (CR
         and CRp in aggregate) [...***...] AML patients of at least [...***...]%
         with a CR rate of at least [...***...]%; or (b) continuation of such
         phase II study with additional patients or Initiation of a phase III
         study. For the purposes of this Agreement, "CR" shall have the meaning
         given to it in Journal of Clinical Oncology, Vol. 21, 2003: 4642-4649:
         "Morphologic complete remission: A CR designation requires that the
         patient achieve the morphologic leukemia-free state and have an
         absolute neutrophil count of more than 1,000/uL and platelets of
         100,000/uL. Hemoglobin concentration or hematocrit has no bearing on
         remission status, although the patient must be red cell and platelet
         transfusion



                                        3      ***CONFIDENTIAL TREATMENT REQUESTED
<PAGE>

         independent (no red cell transfusion for 2 weeks and no platelet
         transfusion for 1 week). The bone marrow would have less than 5% blasts
         and no Auer rods. There is no requirement for bone marrow cellularity.
         There should be no residual evidence of extramedullary leukemia," and
         "CRp" means CR but with platelets of >25,000/uL and
         <100,000uL;

         "COMMERCIAL SALE" means any sale of the Licensed Product to a third
         party in any country in the Territory after the receipt of the
         Marketing Authorization for that country;

         "COMMITTEE MEMBERS" shall have the meaning given in clause 4.1;

         "COMPETING PRODUCT" means any pharmaceutical product (other than the
         Licensed Product) indicated for the treatment of acute myeloid leukemia
         that is marketed or near to market (phase II clinical development or
         later) which in Shire's reasonable opinion is likely to compete with
         the Licensed Product to the detriment of the Licensed Product, but
         excluding:

         (a)       any pharmaceutical product which is a kinase inhibitor owned
                  or licensed by the Licensee; and

         (b)       pharmaceutical products with scientifically documented
                  evidence, demonstrating the potential for use in combination
                  with the Licensed Product.

         "COMPOUND" means the compound troxacitabine;

          "COMPOUND PATENTS" means the patents and patent applications set out in
         Part II of Schedule 2;

         "CONFIDENTIAL INFORMATION" means any scientific, technical,
         formulation, process, manufacturing, clinical, non-clinical,
          regulatory, marketing, financial or commercial information or data
         relating to the business, projects or products of either Party and
         provided by one Party to the other by written, oral, electronic or
         other means in connection with this Agreement;

         "CONSULTANCY AGREEMENT" means the consultancy agreement dated 20
         February 1996 between BioChem Therapeutic Inc. and [...***...];

         "DEVELOPMENT COMMITTEE" means the committee set up by the Parties in
          accordance with clause 4.1;

         "DEVELOPMENT DATA" means any data, charts, studies, summaries,
         analyses, reports, know-how and other information created, generated or
         discovered in connection with the Development Plan or any other
         pre-clinical or clinical trials or studies of the Licensed Product
         conducted by or on behalf of the Licensee;

         "DEVELOPMENT PLAN" means the plan for the development of the Licensed
         Product by the Licensee as set out in Schedule 1 including the
         anticipated Timelines and development budget for the phase II study of
         the Licensed Product;

                                        4     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>



         "EFFECTIVE DATE" means the date of this Agreement;

         "EXCLUDED PATENTS" means the patents and patent applications identified
         in Schedule 9 which are excluded from the license granted to the
         Licensee under this Agreement;

         "FDA" means the United States Food and Drug Administration and any
         successor thereto;

         "FIELD" means all pharmaceutical uses of the Licensed Product except
         that in relation to the University Patents and University Technology,
         "Field" means the treatment of cancer only;

         "FORCE MAJEURE" means in relation to either Party any circumstances
         beyond the reasonable control of that Party;

         "GENERIC PRODUCT" means any pharmaceutical product that is recognized
         by a Regulatory Authority in a particular country in the Territory as
         "AA or AB" rated (or the equivalent rating in any jurisdiction) against
         the Licensed Product or is substitutable at the pharmacy by a
         pharmacist for a prescription written for the Licensed Product;

         "IMPROVEMENT" means any and all discoveries, developments, inventions,
         enhancements or modifications, patentable or otherwise, specifically
         relating to the Licensed Product and for use in the Field created,
         generated or discovered by or on behalf of either Party or its
         Affiliates during the term of this Agreement, but excluding the
         Development Data and any regulatory material generated in connection
         with an application for Marketing Authorization;

         "INTELLECTUAL PROPERTY RIGHTS" means patents, trade marks, service
         marks, logos, trade names, rights in designs, copyright, utility
         models, rights in know-how and other intellectual property rights, in
         each case whether registered or unregistered and including applications
         for registration, and all rights or forms of protection having
         equivalent or similar effect anywhere in the world;

         "INITIATION" means the date of first dosing of the first patient in the
         relevant clinical study;

         "IPO" means an initial public offering of the Licensee's equity
         securities for admission to listing or trading on a recognized
         securities exchange or listing or trading on a recognized securities
         market;

         "LAUNCH" means the commencement of Commercial Sale of the Licensed
         Product in any country of the Territory;

         "LICENSE AGREEMENT" means the license agreement dated 3 January 1996
         between the University of Georgia Research Foundation Inc., Yale
         University, Shire BioChem Inc. (formerly BioChem Pharma Inc.), Tanaud
         Holdings (Barbados) Limited and Tanaud LLC, as amended from time to
         time;



                                       5
<PAGE>

         "LICENSED PRODUCT" means any pharmaceutical formulations that contain
         the Compound alone as a therapeutically active ingredient, or in
         combination with any other pharmaceutically active ingredient;

         "MARKETING AUTHORIZATION" means the grant of all necessary permits,
         authorizations, licenses, approvals (including pricing and
         reimbursement approvals, if applicable) or waivers from any relevant
         Regulatory Authority required for the research, development,
         manufacture, marketing, storage, import, export, transport, use or sale
         of the Licensed Product in any country of the Territory;

         "MARKETING PLAN" means the marketing plan for the Launch, marketing and
         commercialization of the Licensed Product in each country of the
         Territory prepared in accordance with clause 6.2;

         "MEMORANDUM OF UNDERSTANDING" means a memorandum of understanding
         between the University and the Licensee substantially in the form of
         Schedule 7;

         "MINIMUM SALES FORECASTS" means [...***...]% of the [...***...];
         [...***...]% of the [...***...]; [...***...]% of the [...***...]; and
          [...***...]% of the [...***...];

         "MILESTONE EVENT" means the event identified in Schedule 3 which
         triggers a payment under clause 7.2;

         "MILESTONE PAYMENT" means the payment by the Licensee to Shire of the
         sums identified in Schedule 3 on the occurrence of a Milestone Event;

         "MILESTONE PAYMENT TERMS" means the payment of any Milestone Payment or
         other applicable payment under clause 7, to Shire as follows:
         [...***...]% of such payment to Tanaud Ireland; [...***...]% of such
         payment to Tanaud BV; and [...***...]% of such payment to Shire
         BioChem;

         "NDA" means a new drug application and all supplements filed with the
         FDA, including all documents, data and other information concerning the
         Licensed Product which are necessary for, or included in, a Marketing
         Authorization to use, sell, supply or market the Licensed Product in
         the United States of America;

         "NET SALES" means the gross amount invoiced by the Licensee, its
         Affiliates or Sub-Licensees to third parties in respect of sales of the
         Licensed Product, less:

         (a)       trade, quantity and cash discounts or rebates actually allowed
                   and taken, provided that such discounts or rebates are not
                  applied disproportionately to the Licensed Product as compared
                  with similar products of the selling entity, including those
                  granted for rejected, damaged and recalled goods;

         (b)       freight, shipping and related insurance charges, provided that
                  such charges are no more than 1% of Net Sales;


                                       6      ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

         (c)       tax, tariff or customs duties or other government duties
                  (other than income tax) levied on the sale, transportation or
                  delivery of the Licensed Product; and

         (d)       credits, rebates, charge backs or similar payments granted or
                  given to wholesalers or other third party distributors, health
                  care insurance carriers, pharmacy benefit management companies
                  or health care organizations.

                  For the avoidance of doubt, sales or other transfers between
         the Licensee and its Affiliates or its Sub-Licensees are not sales to
         third parties, but Net Sales shall include any subsequent sales of the
          Licensed Product by such Affiliates or Sub-Licensees to any third
         parties. Where the Licensed Product is sold otherwise than on an arms
         length basis, the amount that would have been charged in an arms length
         sale shall be deemed to be the invoice price for such Licensed Product
         and where the Licensed Product is disposed of for consideration other
         than cash, such consideration shall be valued at the fair market value.

         "OTHER TERRITORIES" means throughout the world, except for the Canadian
         Territory and the US Territory;

         "PARTY" AND "PARTIES" means respectively Shire or the Licensee, or as
         the case may be, both such parties;

         "PREMIUM ON EQUITY" means in relation to the acquisition by any third
         party of any equity (or any form of security convertible into equity)
         in the Licensee or its Affiliates in connection with any Sub-License
         Agreement, the excess of actual purchase price paid for such equity
         over the fair market value of such equity. For clarity, if the fair
         market value of the equity is $8.00 and the amount paid by the third
         party is $10.00, the Premium on Equity is $2.00. Any dispute over the
         fair market value of the Licensee's stock shall be resolved through the
         dispute resolution procedure set out in clause 24.2;

         "PRINCIPAL MARKETS" means the United States of America, Canada, Japan,
         the United Kingdom, Germany, France, Italy and Spain;

         "QUARTER" means a three month period ending on the last day of March,
         June, September or December in any calendar year;

         "REASONABLE COMMERCIAL EFFORTS" means commercial efforts consistent
         with normal business practices and effort used by the Licensee in
         connection with other products of similar market size or importance
         which the Licensee intends to launch or has launched and sold in the
         Territory, or in the absence of any such similar products then such
         effort shall be assessed by reference to good business practice in the
         light of all the circumstances;

         "REGULATORY AUTHORITY" means any competent government agency,
         regulatory authority or other administrative body responsible for
         granting Marketing Authorization in a particular country or
         multinational group of countries in the Territory, including the FDA;

         "REMEDIES" shall have the meaning given in clause 12.2;


                                       7
<PAGE>


         "SALES FORECASTS" means the sales of the Licensed Product anticipated
         by the Licensee for a 4 year period from Launch of the Licensed Product
         in the US Territory as set out in Schedule 4;

         "SEC" means the Securities Exchange Commission in the United States of
         America and any successor thereto;

         "SHIRE" means Shire BioChem, Tanaud Ireland or Tanaud BV or
         collectively Shire BioChem, Tanaud Ireland and Tanaud BV as the case
         may be;

         "SHIRE INTELLECTUAL PROPERTY" means the Shire Patents, the University
         Patents, University Technology and the Shire Know-How;

         "SHIRE KNOW-HOW" means all information, procedures, instructions,
         techniques, data, technical information (including toxicological,
         pharmaceutical, non-clinical, clinical and medical data, health
         registration data and marketing data), processing specifications,
         pricing studies and market evaluation materials owned by Shire or its
         Affiliates (other than Shire Laboratories Inc.) and reasonably
         necessary for the development, or in the case of pricing and market
         evaluation materials, for commercialization, of the Licensed Product in
         the Territory;

         "SHIRE MATERIALS" means the Compound and other materials identified in
         Schedule 5;

         "SHIRE PATENTS" means the Compound Patents and Background Patents and
         including, in each case, any divisionals, extensions, reissues,
         substitutions, renewals, continuations, continuations-in-part,
         provisionals, re-examinations and foreign counterparts thereof
         (including European supplementary protection certificates) and patents
         issuing thereon;

         "SUB-LICENSEE" means any non-Affiliate third party sub-licensee of the
         rights (or any part of the rights) granted to the Licensee under this
         Agreement;

         "SUB-LICENSE AGREEMENT" means any agreement between the Licensee and
         the Sub-Licensee granting the right or license under the Shire
         Intellectual Property (or any part of it) to develop, manufacture, have
         manufactured, use, sell, offer for sale, import or supply the Licensed
         Product;

         "SUB-LICENSE INCOME" means any consideration in any form received by
         the Licensee or its Affiliates in connection with a Sub-License
         Agreement, but excluding royalties on Net Sales and amounts received
         under arms length non-convertible debt instruments negotiated on
         standard commercial terms, including (a) upfront fees, milestone
         payments, license maintenance fees, distribution or joint marketing
         fees, development funding (in excess of the Licensee's cost of
         performing such development), and any investment in the Licensee, and
         (b) exchange products, cross-licensed products, options, marketing
         rights and such other forms of non-cash consideration that may be
         deemed to have value;

         "SUB-LICENSEE MOU" means a memorandum of understanding between Shire
         and a Sub-Licensee substantially in the form of Schedule 7;



                                       8
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       "TERRITORY" means the Canadian Territory, the US Territory and the Other
       Territories;

       "THIRD PARTY ACTION" shall have the meaning given in clause 13.1;

       "TIMELINES" means the timelines for the research, development,
        registration and Launch of the Licensed Product as set out in the
       Development Plan;

       "TRADE MARKS" means the trade marks and applications for trade marks set
       out in Schedule 6;

       "UNIVERSITY" means each of the University of Georgia Research Foundation
       Inc. and Yale University;

       "UNIVERSITY PATENTS" means the patents and patent applications set out in
       Part III of Schedule 2 and including, any divisionals, extensions,
       reissues, re-examinations, continuations, and foreign counterparts
       thereof and patents issuing thereon;

       "UNIVERSITY TECHNOLOGY" means the "Licensed Technology" as defined in the
       License Agreement; and

       "US TERRITORY" means the United States of America and its territories and
       possessions.

1.2     In this Agreement, unless the context requires otherwise:

       (a)     the headings are included for convenience only and shall not
              affect its construction;

       (b)     references to "persons" includes individuals, bodies corporate
              (wherever incorporated), unincorporated associations and
              partnerships;

       (c)     words denoting the singular shall include the plural and vice
              versa;

       (d)     references to the word "including" are to be construed without
              limitation;

       (e)     words denoting one gender shall include each gender and all
              genders; and

       (f)     any reference to an enactment or statutory provision is a
              reference to it as it may have been, or may from time to time be
              amended, modified, consolidated or re-enacted.

1.3     The Schedules comprise part of and shall be construed in accordance with
       the terms of this Agreement. In the event of any inconsistency between
       the Schedules and the terms of this Agreement, the terms of this
       Agreement shall prevail.

2.      GRANT OF LICENSE

2.1     Subject to the terms of this Agreement, Shire hereby grants the Licensee:

                                       9
<PAGE>

       (a)     an exclusive license under the Shire Patents and Shire Know-How to
              develop, manufacture, have manufactured, use, sell, offer for
              sale, import and supply the Licensed Product in the Territory and
              in the Field; and

       (b)     an exclusive sub-license under the University Patents and
              University Technology to develop, manufacture, have manufactured,
              use, sell, offer for sale, import and supply the Licensed Product
              in the Territory and in the Field.

2.2     Except to the extent necessary to enable Shire to perform its obligations
       under this Agreement and subject to the terms of the License Agreement
       (and in particular the University's rights under Articles 2.2 and 2.4 of
       the License Agreement) the term "exclusive" for the purposes of clause
       2.1, means to the exclusion of all others, including Shire and its
       Affiliates.

2.3     This Agreement and the grant of any license pursuant to clauses 2.1 and
       10.1 shall in all respects be conditional upon the Licensee receiving
       US$12 million in cash from its investors and providing documentary
       evidence, to Shire's reasonable satisfaction, of receipt of such sum by
       no later than September 30, 2004. If such condition subsequent is not
       fulfilled (or waived) on or before September 30, 2004, this Agreement
       shall automatically terminate, Shire shall be entitled to retain any
       upfront payment received and neither party shall have a claim of any
       nature whatsoever against the other party under this Agreement (except in
       respect of any rights or liabilities of the parties which have accrued
        prior to termination).

2.4     The Licensee undertakes to:

       (a)     use all reasonable efforts to ensure that the condition subsequent
              in clause 2.3 is fulfilled as soon as reasonably practicable and
              in any event by September 30, 2004; and

       (b)     keep Shire informed of the progress towards satisfaction of such
              condition precedent and in particular promptly disclose in writing
              to Shire anything which will or may prevent the condition
               subsequent from being satisfied.

3.      SUB-LICENSING

3.1     The Licensee shall have the right to sub-license the rights granted under
       this Agreement to its Affiliates or any third party, provided that:

       (a)     the Licensee provides Shire the opportunity to review the
              Sub-License Agreement (which, subject to the disclosure to the
              University to the extent required under the License Agreement and
              subject to the Universities' confidentiality obligations
              thereunder, Shire shall treat as Confidential Information of the
              Licensee) prior to its execution and considers in good faith any
              reasonable amendments to the Sub-License Agreement requested by
               Shire and subject to clause 3.1A, shall obtain the University's
              prior consent (such consent not be unreasonably withheld or
              delayed);


                                       10
<PAGE>
       (b)     any Sub-License Agreement shall be in writing and, with the
              exception of the financial terms, be consistent with the terms of
              this Agreement (except that the Sub-Licensee shall not have the
              right to sub-license, unless Shire and the University have
              consented to such right, which consent, if requested by the
              Licensee, shall not be unreasonably withheld or delayed); and

       (c)     the Licensee shall remain responsible to Shire with respect to all
               the operations of its Sub-Licensee relevant to the use Licensed
              Product under this Agreement as if such operations were carried
              out by the Licensee, including the provision of Reasonable
              Commercial Efforts in the development, manufacture, registration
              and Launch of the Licensed Product, the making of any payments
              under this Agreement, the provision of indemnities, the provision
              of insurance and compliance with applicable law.

3.1A    The Licensee may enter into a Sublicense Agreement without the prior
       consent of the University if:

       (a)     the relevant territory of the Sub-License Agreement is outside the
              Principal Markets; or

       (b)     the relevant territory of the Sub-License Agreement is within the
              Principal Markets, provided that, the Sub-Licensee, at the time of
              grant:

              (i)     is listed on a recognized securities exchange and has
                      market capitalization of not less than U.S.$ [...***...]
                     million, or is a private company with cash of not less than
                     U.S.$ [...***...] million; and

              (ii)    has a current marketing authorization for at least one
                     other regulatory-approved pharmaceutical oncology product
                     in any country in the Principal Markets prior to the date
                     of the Sub-License Agreement.

3.2     Shire shall use reasonable endeavours to procure that the University
       signs a Memorandum of Understanding, and shall provide the same to the
       Licensee on the Effective Date for countersignature by the Licensee. Upon
       request by the Licensee, Shire shall consent (which consent shall not be
       unreasonably withheld or delayed) to signing a Sub-Licensee MOU, provided
       that, the reason for the termination of this Agreement does not relate in
       any way to any act or omission of the Sub-Licensee, its Affiliates,
       representatives or sub-licensees.

3.3     In the event that the Licensee enters a Sub-License Agreement pursuant to
       clause 3.1, the Licensee shall promptly after execution of such
       Sub-License Agreement, provide Shire with a copy of the final form of the
       Sub-License Agreement, which Shire shall treat as Confidential
       Information of Licensee.

3.4     The Licensee shall not, and shall procure that its Affiliates and
       Sub-Licensees shall not:

       (a)     utilize any part of the Shire Intellectual Property in the making
              of any patent application, except as otherwise agreed in writing
              by the Parties pursuant to the terms of this Agreement; or

                                       11      ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

         (b)       manufacture, supply, market or sell, or knowingly assist any
                  third party to manufacture, supply, market or sell any
                  Competing Product anywhere in the Territory; unless in the
                  event of a Change of Control of Licensee, the new controlling
                  party has a Competing Product and Shire does not terminate the
                  Agreement pursuant to clause 19.2(c), in which event, this
                  sub-clause 3.3(b) shall not apply.

3.5     Shire agrees not to terminate the License Agreement without the prior
       written consent of the Licensee (which consent shall not be unreasonably
       withheld or delayed). Shire further agrees that within 5 Business Days
       after a request from Licensee, Shire shall provide the University with
       the written notice under clause 2.2(a) of the Memorandum of
       Understanding, provided that the reason for the termination of the
        License Agreement by the University does not relate in any way to any act
       or omission of the Licensee, its Affiliates, representatives or
       Sub-Licensees.

4.      THE DEVELOPMENT COMMITTEE

4.1     The Parties shall establish a Development Committee consisting of 4
       individuals ("COMMITTEE MEMBERS"); 2 of whom shall be nominated by Shire;
       and 2 of whom shall be nominated by the Licensee. Either Party may
       replace its Committee Members by notice to the other Party. The Committee
       Members shall be appropriately qualified and experienced in order to make
       a meaningful contribution to Development Committee meetings.

4.2     The purpose of the Development Committee is to provide a forum for the
       Parties to share information and knowledge on the on-going research,
       development and commercialisation of the Licensed Product including
       monitoring the progress of non-clinical and clinical studies, reviewing
       clinical trial programmes, considering proposed regulatory filings,
       Launch plans, marketing and promotional plans, reviewing competitor
       activity and discussing any regulatory, technical, quality assurance or
       safety issues in relation to the Licensed Product. The Development
        Committee shall conduct its discussions in good faith with a view to
       operating to the mutual benefit of the Parties and in furtherance of the
       successful development and commercialisation of the Licensed Product.

4.3     The Development Committee shall meet as often as the Committee Members
       may determine, but in any event not less than once per calendar year. The
       Committee Members may invite individuals with special skills to attend
       such meetings where it is considered to be relevant and appropriate. The
       quorum for Development Committee meetings shall be 2 Committee Members,
       comprising 1 Committee Member from each Party.

5.      DEVELOPMENT AND MARKETING AUTHORIZATIONS

5.1     Shire shall use reasonable efforts within 90 days from the Effective
       Date:

       (a)     to deliver to the Licensee (or its nominee) the Shire Know-How to
              the extent that it is reasonably necessary for the research and
              development of the Licensed Product by the Licensee in accordance
              with the Development Plan, the University Technology under Shire's
              possession or control;

       (b)     to deliver to the Licensee (or its nominee) the Shire Materials;



                                        12
<PAGE>


       (c)     transfer the investigational new drug application (filed with the
              FDA) relating to the development and use of Licensed Product to
              the Licensee; and

       (d)     transfer its rights and obligations to the Licensee under the
              clinical research services agreements relating to the phase I
              clinical studies ([...***...] and [...***...]) of the Licensed
              Product between Shire Pharmaceutical Development Inc. and
              Quintiles Inc. From the Effective Date, the Licensee shall bear
              the cost of and risk in such phase I studies.

5.2     For a period of 3 months following the Effective Date, Shire shall
       provide the Licensee with a reasonable amount of access during normal
       business hours to [...***...], and [...***...], as is reasonably
       necessary to teach the Shire Know-How to the Licensee, provided that, the
       personnel remain employed or engaged by Shire and such access is limited
       to no more than an aggregate of 25 person working days and no more than 2
       working days in any working week. Shire shall not terminate the
       employment or engagement of any of the above personnel for 3 months
        following the Effective Date. Shire shall promptly inform the Licensee
       if, during such period, any of the relevant personnel cease to work for
       Shire. In the event that the Licensee requires additional access to Shire
       personnel, the Parties shall in good faith negotiate the cost to the
       Licensee of such access.

5.3     The Licensee shall:

       (a)     at [...***...], use its Reasonable Commercial Efforts to perform,
              or procure the performance of, the activities and services in the
              Development Plan;

       (b)     perform, or procure the performance of, any such activities and
              services with reasonable care and skill and ensure that personnel
              employed or engaged by it in the provision of any such activities
              and services are competent and have appropriate professional
              qualifications, training and experience;

       (c)     complete the Development Plan as expeditiously as reasonably
              possible using its Reasonable Commercial Efforts to meet and
              comply with the Timelines; and

       (d)     update Shire at regular intervals, to be agreed between the
              Parties, on the progress of the Development Plan and submit a
               written report to Shire and the University every [...***...] as
              soon as reasonably practicable after [...***...] of each year and
              in any event by [...***...] respectively, detailing its progress
              of the research, development, registration and commercialisation
              of the Licensed Product and the amount of direct expenditures
              associated with the development of the Licensed Product for the
              previous [...***...] months.

5.4     Upon completion of the Development Plan, the Licensee shall, at
       [...***...], use, or cause its Affiliates and Sub-Licensees to use,
       Reasonable Commercial Efforts to prepare, file, prosecute and maintain
       all applications for Marketing Authorization and any other necessary
       licenses, permits, authorizations and approvals (or waivers) required by
       any Regulatory Authority for the Launch, use, promotion, import, sale,
       distribution or commercialisation of the Licensed Product in the
       Principal Markets. The Licensee shall file its application for


                                         13   ***CONFIDENTIAL TREATMENT REQUESTED


<PAGE>


       NDA in the United States of America no later than [...***...] following
       completion of the Development Plan with respect to that country.

6.      LAUNCH AND MARKETING EFFORTS

6.1     The Licensee shall, at [...***...] use its Reasonable Commercial Efforts,
       or procure that its Affiliates or Sub-Licensees use their Reasonable
       Commercial Efforts, to:

       (a)     Launch the Licensed Product in the Principal Markets as soon as
              reasonably practicable following receipt of Marketing
              Authorization in the relevant country and in any event Launch the
              Licensed Product no later than [...***...] following receipt of
              Marketing Authorization in such country; and

       (b)     research, develop, manufacture, distribute and sell, or cause its
              Affiliates or Sub-Licensees (except for third party contract
              research organisations or pharmaceutical manufacturers) to
              research, develop, manufacture, distribute and sell the Licensed
              Product in the Principal Markets.

6.2     The Licensee shall, within [...***...] from filing the NDA for the
       Licensed Product, provide the Development Committee with its Marketing
       Plan setting out its strategy for the Launch of the Licensed Product
       including revised Sales Forecasts (if applicable), anticipated pricing
       levels and reimbursement levels, if appropriate, and marketing and
       promotion plans and spend, in relation to the Licensed Product for the
       calendar year following approval of the NDA. Thereafter, and on or before
       31 October of each calendar year, the Licensee shall provide the
       Development Committee with its Marketing Plan for the next calendar year.
       Each Marketing Plan shall include net sales targets, projections with
       respect to sales force staffing levels, marketing research strategies,
       marketing and promotion plans, physician education plans and general
       advertising and related budgets for sales of the Licensed Product in the
       relevant calendar year.

6.3     Licensee shall:

       (a)     perform, or procure the performance of, the activities set out in
              the Marketing Plan;

       (b)     use Reasonable Commercial Efforts to meet the Sales Forecasts; and

       (c)     on reasonable request from Shire, provide it with copies of the
              packaging, packaging inserts and any advertising or promotional
              materials (including translations, if necessary) used in
              connection with the sale of the Licensed Product in the Territory.

6.4     The Licensee acknowledges that the Sales Forecasts are its good faith
       estimates of sales of the Licensed Product in the Territory based on
       information available to the Licensee at the Effective Date.

6.5      The Licensee may, on submitting the first Marketing Plan and subject to
       the terms of this Agreement, revise the Sales Forecasts. Any reduction in
       the Sales Forecasts must be based on the following:


                                          14   ***CONFIDENTIAL TREATMENT REQUESTED


<PAGE>


       (a)     an unexpected and materially adverse change in the market for the
              Licensed Product in the Territory;

       (b)     unexpected clinical data generated from the Development Plan or an
              unexpected pricing decision from a Regulatory Authority which, in
              each case, has an adverse effect on the anticipated sales of the
              Licensed Product; or

       (c)     advice from a Regulatory Authority which specifies restrictions to
              the use of the Licensed Product that reduces the anticipated
              market for the Licensed Product in the Territory.

6.6     Notwithstanding anything contained in clause 6.5, any such reduction in
       the Sales Forecast in the first Marketing Plan must:

       (a)     be supported by a written report explaining, to Shire's reasonable
              satisfaction, the reasons for such reduction;

       (b)     not be due to reasons which could have reasonably been foreseen by
              the Licensee at the Effective Date and shall not, in any event, be
              less than the [...***...] identified at the Effective Date; and

       (c)     be more than [...***...]% of the initial Sales Forecast before the
              Licensee shall be entitled to seek such a reduction.

6.7     In the event that the Licensee fails to meet a Minimum Sales Forecasts in
       any calendar year, the Licensee shall pay Shire, within 30 days from the
       end of the relevant calendar year, an additional payment representing
       [...***...] that [...***...] on the [...***...] the [...***...] for the
       [...***...] and the [...***...].

7.      ROYALTY AND MILESTONE PAYMENTS

7.1     In consideration of the rights granted under this Agreement, the Licensee
       shall pay Shire (or its nominee) the non-creditable and non-refundable
       sum of US$3 million within 3 Business Days from the Effective Date and
       the non-creditable and non-refundable sum of US$1 million within 5
       Business Days of the first anniversary of the Effective Date, in
       accordance with the Milestone Payment Terms.

7.2     Upon the occurrence of each Milestone Event, the corresponding
       non-refundable Milestone Payment shall be made by the Licensee to Shire
       in accordance with the Milestone Payment Terms. For the avoidance of
       doubt, each Milestone Payment shall be made no more than once with
       respect to the achievement of a Milestone Event, but shall be payable the
       first time the Milestone Event is achieved. [...***...]% of any
       development Milestone Payments (but not sales Milestone Payments) shall
       be creditable against royalties due to Shire under sub-clauses 7.3(a),
       7.3(b), 7.3(c), 7.3(d) (but not royalties under sub-clause 7.3(e)), and
       if applicable, sub-clauses 7.4(a), 7.4(b), 7.4(c), 7.4(d) (but not
       royalties under sub-clause 7.4(e)), provided that, in no event will the
       credit for such development Milestone Payments reduce the royalties
       payable to Shire in any Quarter by more than [...***...]%. Any amount
       that has not been so credited


                                       15     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>


       may be credited against royalties due in subsequent Quarters, subject to
       the limitation described in the previous sentence. For the avoidance of
       doubt, upon expiry or termination of this Agreement, Shire shall not be
       liable to the Licensee for any credit amount accrued and not credited.

7.3     Subject to clauses 7.4, 7.7(b) and 8.2, during the term of this
       Agreement, the Licensee shall pay Shire:

       (a)     a royalty of [...***...]% of the first US$[...***...] of Net Sales
              of the Licensed Product in the Territory in any calendar year;

       (b)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] and up to US$[...***...] in the Territory in any
              calendar year;

       (c)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] and up to US$[...***...] in the Territory in any
              calendar year;

       (d)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] in the Territory in any calendar year; and

       (e)     any royalties or other payments to be made by Shire or its
              Affiliates under the License Agreement or the Consultancy
              Agreement, incurred after the Effective Date, other than payments
              under Articles 4.5 and 4.6 of the License Agreement. [...***...]%
              of any payments made by the Licensee for milestone payments
              properly paid by the Licensee under Article 4.2(c) of the License
               Agreement shall be creditable against royalties in accordance with
              clause 7.2 above.

7.4     At any time during calendar year [...***...], Licensee shall have the
       right to pay to Shire the non-creditable and non-refundable sum of
       US$[...***...] in accordance with the Milestone Payment Terms and in such
       event, Licensee shall have no obligation to make any payments to Shire
       under clause 7.3, but instead shall pay Shire the following:

       (a)     a royalty of [...***...]% of the first US$[...***...] of Net Sales
              of the Licensed Product in the Territory in any calendar year;

       (b)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] and up to US$[...***...] in the Territory in any
              calendar year;

       (c)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] and up to US$[...***...] in the Territory in any
              calendar year;

       (d)     a royalty of [...***...]% of any Net Sales in excess of
              US$[...***...] in the Territory in any calendar year; and

       (e)     any royalties or other payments to be made by Shire or its
              Affiliates under the License Agreement or the Consultancy
              Agreement, incurred after the Effective Date, other than payments
              under Articles 4.5 and 4.6 of the License Agreement.

                                       16     ***CONFIDENTIAL TREATMENT REQUESTED
<PAGE>



7.5      In the event that the Licensee supplies a Licensed Product to any
       customer as part of a package or combination of products, then the Net
       Sales of the Licensed Product shall be whichever is the higher of:


       (a)     the fair market value of such Licensed Product when sold by
              itself; or



       (b)     the proportion of the selling price of such package of products
              which is reasonably attributable to the Licensed Product.



7.6     For the purposes of clause 7.5, fair market value means the value of
       Licensed Product sold to similar customers in the Territory with similar
       pricing and reimbursement structures and for similar quantities. Any
       dispute as to the determination of fair market value or proportion of the
       selling price of a package of products attributable to the Licensed
       Product shall be resolved through the dispute resolution procedure set
       out in clause 24.2.


7.7     Subject to clauses 7.9 and 8.2, in the event that Licensee or its
       Affiliates enters into a Sub-License Agreement in any Territory, then
       Licensee shall pay to Shire in addition to the Milestone Payments:

       (a)     subject to clause 7.10, [...***...]% of any Sub-License Income;
               and

       (b)     in lieu of royalties under clauses 7.3 or 7.4 applicable to Net
              Sales by such Sub-Licensee in its particular territory, the
              greater of:

              (i)     [...***...]% of any royalty payments received by Licensee
                     or its Affiliates from the Sub-Licensee or its Affiliates
                     for sales of Licensed Products by or on behalf of the
                     Sub-Licensee; or

              (ii)    [...***...]% of Net Sales by the Sub-Licensee and its
                     Affiliates.

7.8     In the event that Sub-License Income corresponds to a Milestone Payment
       under this Agreement which has not already been paid by the Licensee and
       such Sub-License Income is greater than the respective Milestone Payment,
       the Licensee shall pay Shire on the occurrence of the Milestone Event the
       full Milestone Payment plus [...***...]% of the difference between the
       Sub-License Income and the relevant Milestone Payment.

7.9     In addition to any payments made by the Licensee under clause 7.7, the
       Licensee shall pay any royalties or other payments to be made by Shire or
       its Affiliates under the License Agreement and the Consultancy Agreement,
        incurred after the Effective Date, other than payments under Articles 4.5
       and 4.6 of the License Agreement.

7.10    In the event that the Licensee or its Affiliates receives any Sub-License
       Income by way of cash consideration in relation to the acquisition of
       equity (or any form of security convertible into equity) in the Licensee
       or its Affiliates or non-cash consideration upon which payment would be
       due to Shire under clause 7.7, the Licensee shall pay Shire:

       (a)     in relation to the acquisition of equity (or any form of security
              convertible into equity) in the Licensee or its Affiliates the
              greater of:


                                       17     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>


              (i)     [...***...]% of the Premium on Equity; or

              (ii)    [...***...]% of the total amount received or to be received
                     by the Licensee or its Affiliates; or

       (b)     in relation to the payment of non-cash consideration, [...***...]%
              of the fair market cash value of such non-cash consideration at
              the date of receipt of the non-cash consideration by the Licensee
              or its Affiliate.

8.      PAYMENT TERMS

8.1     Unless otherwise expressly stated, payments due under this Agreement
       shall be made by the Licensee to Shire (or its nominee) as follows:

       (a)     in respect of any development Milestone Payments, within
              [...***...] days from identification of the occurrence of the
              development Milestone Event by the Licensee;

       (b)     in respect of any sales Milestone Payments, within [...***...]
              days from the end of the Quarter in which the relevant Milestone
              Event occurred;

       (c)     in respect of Net Sales royalty payments during any Quarter,
              within [...***...] days from the end of that Quarter;

       (d)     in respect of any payments under clause 7.7, within [...***...]
              days from receipt of the Sub-Licensing Income by the Licensee or
              its Affiliates from the Sub-Licensee, or in relation to royalties
              on Net Sales within [...***...] days from the end of the relevant
              Quarter; and

       (e)     in respect of any payments to be made under the License Agreement
              during any Quarter, within [...***...] days from the end of the
              Quarter.

8.2     The payment of all Net Sales royalty revenue from the Licensee, its
       Affiliates or its Sub-Licensees, to Shire shall:

       (a)     in respect of sales of the Licensed Product in the US Territory,
              be paid to Tanaud Ireland;

       (b)     in respect of sales of the Licensed Product in the Canadian
              Territory, be paid to Shire BioChem; and

       (c)     in respect of sales of the Licensed Product in the Other
              Territories, be paid to Tanaud BV.

8.3       All payment sums due under this Agreement to Shire shall be paid in US
         dollars. Net Sales shall be determined in the currency in which the
         Licensed Product was sold and shall be converted into US dollars using
         the spot rate on the last day of the relevant Quarter as

                                        18     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

       published by the Wall Street Journal for the relevant Quarter for which
       such payment is being determined.

8.4     At the same time as payment of any Net Sales royalty falls due, the
       Licensee shall submit to Shire a statement in writing recording the
       calculation of the amounts payable and including:

       (a)     the number of Licensed Products which have been supplied in each
              country of the Territory during the previous Quarter;

       (b)     the Net Sales generated in each country of the Territory during
              the previous Quarter; and

       (c)     the amount of royalties due and payable to Shire in relation to
              sales of the Licensed Product in the US Territory, the Canadian
              Territory, the Other Territories, and the Territory as a whole
              (including where appropriate the exchange rate used).

8.5     Interest shall be payable by the Licensee on any amounts payable to Shire
       under this Agreement which are not paid by the due date for payment. All
       interest shall accrue and be calculated on a daily basis (both before and
       after any judgment) at the rate of [...***...]% per annum above the base
       rate of Barclays Bank plc from time to time, for the period from the due
       date for payment until the date of actual payment.

8.6     Notwithstanding any other provision of this Agreement, if at any time
       legal restrictions prevent the prompt remittance of part or all of the
       payments required hereunder in any country, payment shall be made through
       such lawful means as Shire may determine.

8.7     Any tax that the Licensee, its Affiliates or Sub-Licensees are required
        to withhold to comply with relevant laws with respect to the royalties
       and other payments due under this Agreement, shall be deducted from said
       payments prior to remittance; provided, however, that in regard to any
       tax so deducted, the Licensee shall give or cause to be given to Shire
       such assistance, including documentary evidence, as may reasonably be
       necessary to enable Shire to claim exemption therefrom or credit
       therefor, and in each case, the Licensee shall furnish to Shire proper
       evidence of the taxes paid on its behalf. Unless otherwise expressly
       stated, all sums due under this Agreement shall be paid without
       deduction, set-off or counterclaim.

8.8     The obligation of the Licensee to pay royalties and any other payments
       due under this Agreement, shall continue on a country-by-country basis
       for the term of this Agreement. Subject to clause 8.9, in the event that
       there are no issued Shire Patents or University Patents covering the use
       of the Licensed Product in a country in the Territory, the royalty
       payments due to Shire (but not those due to the University under the
       License Agreement) for Net Sales in such country shall be reduced by
       [...***...]%, provided that:

       (a)     one or more Generic Products have been granted marketing
              authorization and are being sold in such country; and


                                       18     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>


       (b)     IMS data demonstrates that the market share for the Licensed
              Product in such country has been reduced by [...***...]% or more
              in any two consecutive Quarters following the launch of the
              Generic Product in such country.

8.9     In the event that after the grant of marketing authorization of the
       Generic Product any Shire Patent or University Patent application is
       issued, and such patent is able to prevent the sale of the Generic
        Product in the relevant country the royalty payments due to Shire for Net
       Sales in such country shall return to the royalty rates set out in clause
       7.3 or 7.4 as applicable.

9.      RECORDS AND REPORTS

9.1     During the term of this Agreement, and for a period of [...***...] years
       after its expiry or termination, the Licensee shall, and shall procure
       that its Affiliates and Sub-Licensees shall, keep at its or their normal
       place of business detailed, accurate and up to date records and books of
       account showing the sales of the Licensed Product in each country in the
       Territory sufficient to ascertain:

       (c)     any Net Sales generated in connection with the sale of the
              Licensed Product and royalties payable to Shire under this
              Agreement; and

       (d)     the achievement or progress towards achievement of any Milestone
              Event, provided that, in the event that the Milestone Event
              relates to the development of the Licensed Product, the Licensee
              has failed to meet the Timelines and, in Shire's reasonable
              opinion, the Licensee has failed to adequately explain the reasons
              for the delay.

9.2     On no less than [...***...] Business Days notice from Shire, the Licensee
       shall make, or procure that its Affiliates or Sub-Licensees make, such
       records and books of account available for inspection by Shire (or its
       nominee) for the purpose of audit to confirm payments due under this
       Agreement, but not more than [...***...] in any calendar year in relation
       to royalties payable to Shire under this Agreement and not more than
       [...***...] in any calendar year in relation to the achievement of any
       Milestone Event. Shire (or its nominee) shall be entitled to take copies
       or extracts from such records or books of account during any such review
       or audit.

9.3     Shire shall be solely responsible for its costs and expenses in making
       any such review or audit, unless Shire identifies a discrepancy in the
       sums paid in any calendar year from those payable under this Agreement
       for that calendar year of greater than [...***...]%, in which event the
       Licensee shall pay Shire's costs and expenses incurred in connection with
       the review or audit, and make good the deficit in the payments (including
       any interest amount calculated in accordance with clause 8.5).

9.4     All information disclosed by the Licensee, its Affiliates or its
       Sub-Licensees pursuant to this clause 9 shall be deemed Confidential
       Information of Licensee, its Affiliates or its Sub-Licensees, as
       applicable.


                                       20     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

10.       TRADE MARKS

10.1      Shire hereby grants the Licensee an exclusive license, with the right
         to sublicense, to use the Trade Marks in relation to the sale,
         promotion and marketing of the Licensed Product in the Territory for
         the term of this Agreement. The Licensee shall:

         (a)       use the Trade Marks only in a manner which conforms to the
                  reasonable directions and standards notified to it by Shire
                   from time to time;

         (b)       market the Licensed Product throughout the Territory under the
                  Trade Marks and ensure that all marketing materials for the
                  Product shall display the Trade Marks;

         (c)       not use, register or attempt to register any trade marks,
                  company, business or trading names or domain names which are
                  identical or similar to (or which incorporate) any of the
                  Trade Marks, any aspect of them, or any other trade marks or
                  trade names used by Shire, without Shire's prior written
                  consent; and

         (d)       not do anything which could, in Shire's reasonable opinion,
                  bring the Trade Marks or Shire into disrepute or which could
                  otherwise damage the goodwill attaching to the Trade Marks or
                  any other trade marks or trade names of Shire.

10.2      Shire shall, [...***...], maintain the registrations for the Trade
         Marks, and shall use reasonable efforts to prosecute any applications
         for registration of the Trade Marks through to grant in the Territory.

10.3      The Licensee acknowledges that:

         (a)       it shall not acquire, nor claim, any right, title or interest
                  in or to any of the Trade Marks or the goodwill attaching to
                  them by virtue of this Agreement or its use of the Trade
                  Marks, other than the rights specifically granted to it under
                  clause 10.1; and

         (b)       all goodwill arising from use of the Trade Marks by the
                  Licensee before, during or after the term of this Agreement
                  shall accrue and belong to Shire, and the Licensee shall, at
                  Shire's request and cost, promptly execute all documents
                  required by Shire to confirm this.

11.       INTELLECTUAL PROPERTY, IMPROVEMENTS AND PATENTS

11.1      Except as set out in this Agreement and the License Agreement, all
         right, title and interest in the Shire Intellectual Property and the
         Trade Marks shall belong to Shire, and the Licensee shall not have any
         right, title or interest in the Shire Intellectual Property or the
         Trade Marks.


11.2      All Intellectual Property Rights in the Development Data shall belong
         to the Licensee. The Licensee shall disclose reasonably detailed
         summaries of the Development Data to Shire through the Development
         Committee.


11.3      Shire shall, at its sole option, file, prosecute, maintain or extend
         the Shire Patents. Subject to the terms of the License Agreement, Shire
         shall:



                                       21     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>


         (a)       keep the Licensee reasonably informed of any material
                  developments or notices in connection with the prosecution of
                  any Shire Patents or University Patent applications, but only
                  to the extent that the material developments or notices relate
                  to the Licensed Product;

         (b)       give the Licensee a reasonable opportunity to comment on any
                  Shire response to such developments or notices that are
                  intended to be filed in any patent office in relation to the
                  Compound Patents and consider in good faith any such comments;
                  and

         (c)       give the Licensee a reasonable opportunity to liaise and
                  cooperate with the University in the prosecution and
                  maintenance of the University Patents.

11.4      Any expenses incurred after the Effective Date in the filing,
          prosecution or maintenance of:


         (a)       the University Patents, shall borne by the Licensee;



         (b)       the Compound Patents shall be borne by the Licensee and shall
                  be creditable (but non-refundable) against royalty payments
                  due from Licensee to Shire under clause 7 (including for the
                  avoidance of doubt, payments under clause 7.7(b)), provided
                  that, in no event will any credit amount under this Agreement
                   reduce the royalties payable to Shire in any Quarter by more
                  than [...***...]% (and any amount that has not been so
                  credited may be credited against royalties due in subsequent
                  Quarters, subject to the limitation described in the previous
                  sentence); and



         (c)       the Background Patents, shall be borne by Shire.


11.5      In the event that Shire elects not to continue to file, prosecute or
         maintain patent protection for any of the Compound Patents, the
         Licensee shall have the right, at its option, to maintain such Compound
         Patents on behalf of Shire. Without limiting the generality of the
         foregoing, in no event shall Shire provide the Licensee with notice of
         abandonment of any Compound Patents less than 30 days prior to its date
         of lapse.

11.6      Shire shall maintain patent protection for all Background Patents
         identified as [...***...] and [...***...] in the Principal Markets.

11.7      Shire reserves all of its rights not expressly granted to the Licensee
         under this Agreement. The Licensee shall not, and shall not attempt or
         purport to file or prosecute in any country any patent application
         which claims, or purports to claim, any Shire Intellectual Property,
         except as permitted under clause 11.5. Additionally, the Licensee shall
         not, directly or indirectly prevent or attempt to prevent Shire from
          filing or prosecuting in any country any patent application which
         claims, discloses or uses or purports to claim, disclose or use any
         Shire Intellectual Property.

12.       INFRINGEMENT OF SHIRE INTELLECTUAL PROPERTY RIGHTS

12.1      Each Party shall promptly notify the other, with such details as it has
         in its possession, on becoming aware of any third party infringement,
         or suspected infringement, of any part of the Shire Intellectual
         Property or the Trade Marks in the Territory.


                                       22     ***CONFIDENTIAL TREATMENT REQUESTED

<PAGE>


12.2      Subject to the terms of the License Agreement, Shire shall have the
         first right, but not the obligation, to take action in respect of any
         infringements of the Shire Intellectual Property or the Trade Marks,
         including any injunctive, compensatory or other remedies or relief
         (collectively "REMEDIES") as may be necessary or desirable to prevent
         such infringement and preserve the Shire Intellectual Property. The
         Licensee shall permit any such Remedies to be brought in its name if
         permitted or required by law. Shire may compromise or settle any of the
         Remedies at its sole discretion, provided that, Shire shall not make
         any settlement or compromise that adversely affects the interests of
         the Licensee in respect of the Licensed Products in the Territory
         without the prior written consent of the Licensee, such consent not to
         be unreasonably withheld or delayed.

12.3      In the event that Shire does not pursue any Remedies with respect to
         the Shire Intellectual Property or the Trade Marks within 60 days
         following notice of alleged infringement or 10 days before the time
         limit, if any, for the filing of any infringement action, whichever is
         sooner, then the Licensee shall, subject to the terms of the License
         Agreement, have the right but, not the obligation, to pursue the
         Remedies against such third party infringer at its sole cost, provided
         that, the Licensee does not make any settlement or compromise that
         adversely affects the interests of Shire without the prior written
          consent of Shire, such consent not to be unreasonably withheld or
         delayed. For the avoidance of doubt, the Licensee's right to pursue any
         Remedies with respect to the infringement, or suspected infringement,
         of any part of the Shire Intellectual Property is limited to the extent
         that such infringement, or suspected infringement relates to the
         Compound.

12.4      In the event that either Party pursues the Remedies under clauses 12.2
         or 12.3:

          (a)       the other Party shall provide reasonable assistance to and
                  cooperate with the Party pursuing such Remedies, including
                  providing access to relevant documents and personnel and
                  furnishing a power of attorney if required by law;

         (b)       the Party


 
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