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EX-10.38: COLLABORATION AND LICENSE AGREEMENT

Collaboration Agreement

EX-10.38: COLLABORATION AND LICENSE AGREEMENT | Document Parties: MEMORY PHARMACEUTICALS CORP | AMGEN INC., You are currently viewing:
This Collaboration Agreement involves

MEMORY PHARMACEUTICALS CORP | AMGEN INC.,

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Title: EX-10.38: COLLABORATION AND LICENSE AGREEMENT
Date: 3/31/2006
Industry: Biotechnology and Drugs    

EX-10.38: COLLABORATION AND LICENSE AGREEMENT, Parties: memory pharmaceuticals corp , amgen inc.
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                                                                   EXHIBIT 10.38

                       COLLABORATION AND LICENSE AGREEMENT

      THIS COLLABORATION AND LICENSE AGREEMENT (this "AGREEMENT"), having a date
of October 14, 2005 (the "EFFECTIVE DATE"), is made by and between, on the one
hand, AMGEN INC., a Delaware corporation, having its principal place of business
at One Amgen Center Drive, Thousand Oaks, California 91320 ("AMGEN"), and, on
the other hand, MEMORY PHARMACEUTICALS CORP., a Delaware corporation, having its
principal place of business at 100 Philips Parkway, Montvale, New Jersey 07645
("MEMORY").

                                  INTRODUCTION

1.     Memory has discovered compounds active as PDE10 inhibitors and owns
       related intellectual property rights.

2.     Amgen has expertise in the research, development, manufacture and
      commercialization of human therapeutics.

3.     The parties wish to collaborate to research inhibitors and other
      modulators of PDE10.

4.     In consideration of the mutual covenants and promises contained in this
      Agreement and other good and valuable consideration, the receipt and
      sufficiency of which are hereby acknowledged, Memory and Amgen agree as
      follows:

                              ARTICLE 1. DEFINITIONS

As used in this Agreement, the following terms, whether used in the singular or
plural, shall have the following meanings:

1.1    "AFFILIATE" means (a) a person or business entity which owns, directly or
       indirectly, more than fifty percent (50%) of the voting shares or other
      means of control of a Person; or (b) a business entity in which more than
      fifty percent (50%) of the voting shares or other means of control are
      owned by a Person, either directly or indirectly; or (c) a business
      entity, the majority ownership of which is directly or indirectly common
      to the majority ownership of a Person. Notwithstanding the preceding
      provisions, with respect to an Affiliate of a Party to this Agreement,
      once an entity ceases to be an Affiliate, then such entity shall, without
      any further action, cease to have any rights, including license and
      sublicense rights, under this Agreement that it has by reason of being an
      Affiliate.

1.2    "AGREEMENT TERM" means the term of this Agreement, more fully described in
      Section 12.1.

1.3    "AMGEN INVENTION" means an Invention having as inventors employees,
      consultants or agents of Amgen or its Affiliates, but not employees,
      consultants or agents of Memory or its Affiliates, as determined under US
      patent law.

1.4    "AMGEN KNOW-HOW" means all Know-How that Amgen owns, or otherwise is
      Controlled by Amgen, during the Agreement Term. Notwithstanding the
      foregoing, Amgen Know-

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       1
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      How shall not be deemed to include Memory Know-How solely based upon the
      fact that Amgen may Control such Memory Know-How under this Agreement.

1.5    "AMGEN PROPERTY" means (1) an exclusive, royalty bearing license, under
      intellectual property (including Collaboration Technology, Joint
      Inventions, Patent Rights Covering Collaboration Technology, and Joint
      Patent Rights) controlled by Amgen that is exclusively related to the Lead
      Compounds to make, have made, use, offer for sale, sell and import the
      Lead Compounds (subject to Amgen's retained non-exclusive research license
      to Memory Inventions that relate to Memory compounds consisting of PDE10
      inhibitors or modulators, including Memory Compounds, and non-exclusive
      license to any other Memory Invention as provided under Section 2.1 and
      further subject to Sections 12.5(a) and 12.5(b)); (2) [*] (in the case of
      each of (1) and (2), in the event that the Lead Compounds is not in
      clinical trials at the time of termination of the Agreement, then (1) and
      (2) shall [*]); and (3) the assignment and transfer to Memory, or its
      Affiliates as requested by Memory, free of any liens, pledges or security
      interests (collectively, "LIENS"), of all of Amgen's right, title and
      interest in and to (i) [*](to the extent assignable and not cancelled by
      the party(ies) thereto other than Amgen) to the extent relating solely to
      the Lead Compounds, (ii) [*] in Amgen's possession or in the possession of
      its Affiliates or its or their respective agents to the extent solely
       relating to the Lead Compounds (PROVIDED, HOWEVER, that Amgen may redact
      any information that does not relate to the Lead Compounds), (iii) all
      rights relating to the infringement of Memory Patent Rights and Joint
      Patent Rights by Third Parties, solely relating to the Lead Compounds,
      (iv) all rights relating to patent prosecutions described in Section 9.2
      relating solely to the Lead Compounds (and Amgen shall thereafter use
      diligent efforts to file divisionals to separate any patent claims solely
      relating to the Lead Compounds from those relating to other compounds) and
      (v) any trademarks or trademark applications that are solely used or
      solely intended for use for the Lead Compounds, and not for any products
      of Amgen or any of its Affiliates, and so long as any such trademarks or
      trademark applications do not use the name Amgen or any derivative
      thereof.

1.6    "CALENDAR QUARTER" means each respective period of 3 consecutive months
       ending on March 31, June 30, September 30 and December 31 of each Calendar
      Year.

1.7    "CALENDAR YEAR" means each successive period of 12 months commencing on
      January 1 and ending on December 31.

1.8    "CHANGE OF CONTROL OF MEMORY" means the occurrence of any of the following
      events:

      (a)    Any person (as such term is defined under Section 13(d)(3) of the
            Securities Exchange Act of 1934, as amended (the "EXCHANGE ACT")),
            corporation or other entity hereafter becomes the beneficial owner
            (as such term is defined in Rule 13d-3 under the Exchange Act) of
            securities of Memory [*] representing [*] percent ([*]%) or more of
            the combined voting power of the outstanding securities of Memory
            which ordinarily (and apart from rights accruing under special
            circumstances) have the right to vote in the election of directors
            (calculated as provided in paragraph (d) of such Rule 13d-3 in the
             case of rights to acquire the Memory's securities) (the
            "SECURITIES");

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

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      (b)    As a result of a tender offer, merger, sale of assets or other major
            transaction, the persons who are directors of Memory immediately
            prior to such transaction cease to constitute a majority of the
            Board of Directors of Memory (or any successor corporations)
             immediately after such transaction;

      (C)    [*] Memory is merged or consolidated with any other person, firm,
            corporation or other entity and, as a result, the shareholders of
            Memory, as determined immediately before such transaction, own less
            than [*] percent ([*]%) of the outstanding Securities of the
            surviving or resulting entity immediately after such transaction;

      (d)    Memory transfers all or substantially all of its assets to another
             person, firm, corporation or other entity;

      (e)    An Industry Buyer acquires twenty percent (20%) or more of the
            outstanding Securities of Memory; or

      (f)

            (1)    Memory becomes bankrupt or insolvent, or files a petition in
                  bankruptcy or makes a general assignment for the benefit of
                  creditors or otherwise acknowledges in writing insolvency, or
                  is adjudged bankrupt, and Memory (i) fails to assume this
                   Agreement in any such bankruptcy proceeding within thirty (30)
                  days after filing or (ii) assumes and assigns this Agreement
                  to a Third Party;

            (2)    Memory grants to a party other than Amgen a security interest
                  in any intellectual property licensed to Amgen hereunder
                  (unless Memory has first granted to Amgen a security interest
                  in such intellectual property to secure Memory's obligations
                   under this Agreement and the security interest granted by
                  Memory to such party is subordinated or junior in priority to
                  the security interest granted by Memory to Amgen, PROVIDED,
                  HOWEVER, [*];

             (3)    Memory goes into or is placed in a process of complete
                  liquidation;

            (4)    a trustee or receiver is appointed for any substantial portion
                  of Memory's business who is not discharged within [*] days
                  after appointment;

            (5)    any case or proceeding shall have been commenced or other
                  action taken against Memory in bankruptcy or seeking
                  liquidation, reorganization, dissolution, a winding-up
                  arrangement, composition or readjustment of its debts or any
                  other relief under any bankruptcy, insolvency, reorganization
                  or similar act or law of any jurisdiction now or hereafter in
                   effect and is not dismissed or converted into a voluntary
                  proceeding governed by clause (f)(1) above within [*] days
                  after filing; or

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                        3
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            (6)    there shall have been issued a warrant of attachment,
                  execution, distraint or similar process against any
                  substantial part of the property of Memory and such event
                   shall have continued for a period of [*] days undismissed, not
                  bonded in a manner reasonably satisfactory to Amgen or
                  undischarged.

1.9    "CHANGE OF CONTROL RIGHTS" means [*].

1.10   "COLLABORATION COMPOUND" means a PDE10 inhibitor or modulator (a) for
      which Amgen during the Agreement Term has rights, whether by reason of its
      own conception of such inhibitor or modulator or under agreement with a
      Third Party, (b) was identified or confirmed as a PDE10 inhibitor or
      modulator through the use of the Memory Screening Technology, and (c)
      subject to Section 7.3(a), with respect to which the initial IND for the
      inhibitor or modulator has been filed within [*] years after the Effective
      Date by Amgen or its Affiliate.

1.11   "COLLABORATION TECHNOLOGY" means all Know-How generated in the conduct of
      the Research Collaboration by Amgen and Memory jointly or solely by
      Memory, as well as all Know-How, inventions, and/or intellectual property
      rights created, developed or generated by Memory or its Affiliates with
      respect to any PDE10 inhibitors or modulators in violation of Section 2.5.

1.12   "COMPOSITION OF MATTER CLAIM" means, for a given Product in a given
      country of the Territory, a Valid Claim of a Memory Patent Right or a
      Joint Patent Right that Covers the composition of matter of the PDE10
      inhibitor or modulator per se that is included in such Product, in whole
      or as a component thereof, as an active ingredient of such Product.

1.13   "COMPOUND" means either a Primary Compound or a Secondary Compound.

1.14   "CONTROL" means, with respect to any Know-How, Material or intellectual
      property right (including Patent Rights), possession by a party of the
      ability (whether by ownership, license or otherwise) to grant access, a
      license or a sublicense to such Know-How, Material or intellectual
      property right as provided for in this Agreement without violating the
       terms of any agreement with any Third Party in existence as of the
      Effective Date. With respect to any Know-How, Material or intellectual
      property right (including Patent Rights) to which either party obtains
      rights after the Effective Date, then Control shall include possession by
      such party of the ability (whether by ownership, license or otherwise) to
      grant access, a license or a sublicense to such Know-How, Material or
      intellectual property right as provided for in this Agreement without
      violating the terms of any agreement with any Third Party pursuant to
      which such Know-How, Material or intellectual property rights were
      obtained or developed (PROVIDED, HOWEVER, that with respect to Know-How
       that is obtained or developed outside of the Research Collaboration, then
      Control means possession by such party of the ability (whether by
      ownership, license or otherwise) to grant access, a license or a
      sublicense to such Know-How as provided for in this Agreement without
      violating the terms of any agreement with any Third Party pursuant to
      which such Know-How was obtained or developed or in existence as of the
      date such party obtains such rights).

                      [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       4
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1.15   "COVER" (including the variations such as "Covered", "Coverage" or
      "Covering") means that the making, using, offering for sale, selling or
      importing of the product or invention being referenced would infringe a
      Valid Claim of a Patent Right in the absence of a license under such
      Patent Right. Except to the extent set forth in Section 5.2, the
      determination of whether a product or invention is Covered by a particular
      Patent Right shall be made on a country-by-country basis.

1.16   "DEDICATED PERSONNEL" means [*] percent ([*]%) of the Memory personnel who
      performed the Amgen funded FTE activities under the Research Collaboration
      during the [*] immediately preceding the occurrence of the applicable
      Change of Control of Memory (rounded down to the nearest whole number).

1.17   "EUROPE" means the [*].

1.18   "FDA" means the United States Food and Drug Administration, or its foreign
      equivalent.

1.19   "FIELD" means all uses, including prophylaxis, palliative, diagnostic, and
      therapeutic.

1.20   "FTE" means the equivalent of the work of one employee full time for one
      year (consisting of at least a total of [*] weeks or [*] hours per year
      (excluding vacations and holidays) of work on or directly related to the
      Research Collaboration), carried out by a Memory employee or a permitted
      subcontractor. No more than [*] hours per week of overtime shall be
      counted toward the number of hours that are used to calculate the FTE
      contribution. No one person shall be permitted to account for more than
      one FTE.

1.21   "FTE RATE" means [*] Dollars ($[*]) per FTE per year.

1.22   "GENERAL INVENTION" means a Memory Invention that is not specifically
      related to a Compound, a Product or the inhibition or modulation of PDE10.

1.23   "IND" means an Investigational New Drug Application filed with the FDA for
      human clinical testing of a drug.

1.24   "INDUSTRY BUYER" means an entity that, together with its Affiliates, has
      an average annual pharmaceutical and/or biotechnology pre-clinical
      research expenditure of more than [*]. Notwithstanding the foregoing, a
      bona fide venture capital or private equity firm that is not owned or
      controlled by, and does not own or control a significant biotechnology or
      pharmaceutical company shall not be deemed to be an Industry Buyer. For
      the purposes of illustration, the Parties consider the following to not be
      Industry Buyers because they are bona fide venture capital or private
      equity firms that are not owned or controlled by, and do not own or
      control a significant biotechnology or pharmaceutical company: [*]

1.25   "INITIATION OF PHASE 2A CLINICAL TRIAL" means the date that a patient is
      first dosed by or on behalf of Amgen, its Affiliate or sublicensee with a
      Product in a clinical trial on sufficient numbers of patients that is
      designed to establish the safety and efficacy of a drug for its intended
      use, and to define warnings, precautions and adverse reactions that are
      associated with the drug in the dosage range to be prescribed and that
      satisfies the requirements of 21 CFR 312.21(b) (or its successor
      regulation), or its foreign equivalent.

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       5
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1.26   "INITIATION OF PHASE 2B CLINICAL TRIAL" means the date that a patient is
      first dosed by or on behalf of Amgen, its Affiliate or sublicensee with a
      Product in a second clinical trial (of such Product) on sufficient numbers
      of patients that is designed to establish the safety and efficacy of a
      drug for its intended use, and to define warnings, precautions and adverse
      reactions that are associated with the drug in the dosage range to be
      prescribed and that satisfies the requirements of 21 CFR 312.21(b) (or its
      successor regulation), or its foreign equivalent. Notwithstanding the
      foregoing, if the first such clinical trial for such Product was
      prematurely terminated or suspended and the parameters of such second
      clinical trial are similar to those of the first such clinical trial of
      such Product, then the date that a patient is first dosed in such second
      clinical trial shall be deemed to be another Initiation of Phase 2a
      Clinical Trial and not an Initiation of Phase 2b Clinical Trial.

1.27   "INITIATION OF PHASE 3 CLINICAL TRIAL" means the date that a patient is
      first dosed by or on behalf of Amgen, its Affiliate or sublicensee with a
      Product in a clinical trial of sufficient numbers of patients that, if the
      defined end-points are met, is intended to be a pivotal trial for
      obtaining Regulatory Approval or otherwise intended to supplement existing
      data on the drug and thereby establish that a drug is sufficiently safe
      and efficacious for its intended use for the purposes of obtaining
      Regulatory Approval, and to provide an adequate basis for defining in
      physician labeling the warnings, precautions and adverse reactions that
      are associated with the drug in the dosage range to be prescribed, and
      which is intended to support Regulatory Approval of such drug in the
      United States, European Union or any country in the European Union and
      that satisfies the requirements of 21 CFR 312.21(c), or its successor
      regulation, or an equivalent foreign clinical trial.

1.28   "INVENTION" means an invention, including any Compound, that is made in
      the conduct of the Research Collaboration.

1.29   "JOINT COMPOUND" means any PDE10 inhibitor or modulator which is Covered
      by a Composition of Matter Claim under a Joint Patent Right.

1.30   "JOINT INVENTION" means an Invention having at least one co-inventor who
      is an employee, consultant or agent of Amgen and/or its Affiliates, and at
      least one co-inventor who is an employee, consultant or agent of Memory
      and/or its Affiliates, as inventorship is determined under U.S. patent
      law.

1.31   "JOINT PATENT RIGHTS" means patent claims (and the Patent Rights in which
      those claims are contained), which if issued would, or as issued do, Cover
      a Joint Invention and, under US patent law, require the naming of at least
      one co-inventor who is an employee, consultant or agent of Amgen and/or
      its Affiliates, and at least one co-inventor who is an employee,
      consultant or agent of Memory and/or its Affiliates.

1.32   "JRC" means that committee organized and operating as provided in Article
      7.

1.33   "KNOW-HOW" means data, know-how, trade secrets, methods, knowledge and
      information, including materials, samples, chemical manufacturing data,
      toxicological data, pharmacological data, preclinical data, assays,
      platforms, formulations, specifications, quality control testing data,
      that are necessary or useful for the research,

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       6
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      discovery, manufacture, development or commercialization of any Product in
      the Territory.

1.34   "LAUNCH" means, with respect to a Product in a country of the Territory,
      the date of the first commercial sale by or on behalf of Amgen, its
      Affiliate or its sublicensee of the given Product in the given country
      after Regulatory Approval (if required) in such country.

1.35   "LEAD COMPOUND(S)" shall mean the Compound which, prior to the events
      triggering the provisions of Section 12.5(a), has [*] (unless another
      Memory Compound or Joint Compound that has reached IND enabling toxicology
      studies is selected in writing by Memory as a lead compound), together
      with a [*] Compound which other than the aforementioned Compound has [*]
      (unless another Memory Compound or Joint Compound that has reached IND
      enabling toxicology studies is selected in writing by Memory as a back-up
      compound).

1.36   "MAJOR MARKET COUNTRIES" means the [*].

1.37   "MATERIALS" means certain biological materials or chemical compounds
      including assays, Compounds, screens, knock-out mice and other animal
       models, cell lines, cells, nucleic acids, receptors and reagents
      Controlled by the supplying Party. "Materials" shall be deemed to include
      the materials listed on Schedules 1.42, 1.60, and 1.65 each as attached
      hereto, which Memory will provide to Amgen pursuant to Section 7.1(c) of
      this Agreement.

1.38   "MEMORY COMPOUND" means any PDE10 inhibitor or modulator for which Memory
      during the Agreement Term has rights, whether by reason of its own
      conception of such inhibitor or modulator or under agreement with a Third
      Party, which is Covered by a Valid Claim of a Memory Patent Right.

1.39   "MEMORY INVENTION" means an Invention having as inventors employees,
      consultants or agents of Memory or its Affiliates, but not employees,
      consultants or agents of Amgen or its Affiliates, as determined under US
      patent law.

1.40   "MEMORY KNOW-HOW" means all Know-How that Memory owns, or otherwise is
      Controlled by Memory, during the Agreement Term.

1.41   "MEMORY PATENT RIGHTS" means all Patent Rights that Memory owns, or
      otherwise are Controlled by Memory, during the Agreement Term, excluding
      any Joint Patent Rights. Schedule 1.41 lists all Memory Patent Rights that
      claim compounds that inhibit or modulate PDE10 as of the date hereof
      ("BASE PATENTS").

1.42   "MEMORY SCREENING TECHNOLOGY" means all of the screens and counterscreens
      for the PDE10 program [*] Controlled by Memory during the Agreement Term.
      To each parties knowledge, as of the Effective Date, Schedule 1.42 sets
      forth all Memory Screening Technology then in existence.

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       7
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1.43   "MEMORY TECHNOLOGY" means the Memory Compounds, the Memory Screening
      Technology and in addition to the foregoing the reagents, protocols and
      documentation necessary and/or useful for Amgen to perform Memory's PDE10
      assay(s), Controlled by Memory during the Agreement Term, including in
      vitro and in vivo behavioral and other assays, as well as all Know-How,
      Materials and documentation Controlled by Memory relating to PDE10.

1.44   "NDA" means a New Drug Application, or its foreign equivalent, filed with
      the FDA for a drug.

1.45   "NET SALES" means, with respect to a certain time period, the gross
      invoiced sales prices charged for all Products sold by or for Amgen, its
      Affiliates and sublicensees in arms length transactions to Third Parties
      (but not including sales relating to transactions between Amgen, its
      Affiliates, and/or their respective sublicensees) during such time period,
      less the total of the following estimated and/or incurred charges or
      expenses to the extent attributable to the sale of the Product: [*].

      All of the sales, and deductions taken above, shall be determined in
      accordance with GAAP. [*]. For the purposes of this Agreement, "GAAP"
      means generally accepted accounting principles.

      Any disposal of Products for, or use of Products in, clinical or
      pre-clinical trials, given as free samples in accordance with applicable
      law, or distributed at no charge to patients unable to purchase Product
      shall not be included in Net Sales.

      Where a Product is sold together with other pharmaceutical products
      (excluding devices used for using or administering the Product excluded
      from Net Sales above) for a single price (whether sold together in the
       same package, or merely price bundled) then for the purposes of
      calculating the Net Sales for the Products under this Agreement, the
      Product shall be deemed to be sold for an amount equal to the following:

                        (X divided by Y) multiplied by Z

      where X is the average sales price during the applicable reporting period
      generally achieved for the Product in the country in which such sale or
      other disposal occurred when such Product is sold alone and not with other
      pharmaceutical products; Y is the sum of the average sales price during
      the applicable reporting period generally achieved in that country when
      sold alone by each product (including the Product) included in the bundle
      of pharmaceutical products that is sold for the single price; and Z equals
      the single price at which the bundle of pharmaceutical products
      represented in Y was actually sold. In the event one or more of the
      products in the bundled product are not sold separately, the parties shall
      confer in good faith to determine a fair market price that shall be
      equitable for the value of the Product within the bundled product.

1.46   "PARTY" means Amgen or Memory. "PARTIES" means Amgen and Memory.

1.47   "PATENT RIGHT" means all rights under (a) any patent or patent application
      in any country of the Territory, (b) all patent applications filed in any
      jurisdiction corresponding to or

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

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      claiming priority from the patents and/or patent applications referred to
      in the foregoing clause (a); (c) all divisionals, continuations and
      continuations-in-part of the patent applications referred to in the
      foregoing clauses (a) and (b); (d) all patents issuing from the patent
      applications referred to in the foregoing clauses (a), (b) and (c); and
      (e) all reissues, re-examination certificates, registrations,
      confirmations, extensions, substitutions, renewals and supplementary
      protection certificates of the patent and/or patent applications referred
      to in the foregoing clauses (a), (b), (c) and (d).

1.48   "PDE10" means any biological molecule that is a member of the family of
      [*] generally known as PDE10, [*], PDE10A (amino acid sequences of which
      are attached hereto as Schedule 1.48), and any and all of the following
      biological molecules related to PDE10: [*]

1.49   "PERSON" means any individual, corporation (including any non-profit
      corporation), general partnership, limited partnership, limited liability
      partnership, joint venture, estate, trust, company (including any limited
      liability company or joint stock company), firm or other enterprise,
      association, organization, entity or governmental entity.

1.50   "PRIMARY COMPOUND" means a Memory Compound, a Joint Compound or a
      Collaboration Compound.

1.51   "PRIMARY PRODUCT" means a product that includes, in whole or as a
      component thereof, a Primary Compound.

1.52   "PRODUCT" means any Primary Product or Secondary Product.

1.53   [*]

1.54   "REGULATORY APPROVAL" means any approvals (including pricing and
      reimbursement approvals), licenses, registrations or authorizations of any
      national or international or local regulatory agency, department, bureau
      or other governmental entity, necessary for the manufacture and sale of a
      Product in the Field in a regulatory jurisdiction in the Territory by
      Amgen, its Affiliate or sublicensee.

1.55   "REINSTATABLE RIGHTS" means [*].

1.56   "RESEARCH COLLABORATION" means the collaborative non-clinical research
      program between the Parties relating to PDE10 inhibitors and modulators,
       as more fully described in the Research Workplan.

1.57   "RESEARCH WORKPLAN" means the plan of non-clinical research activities
      attached as Schedule 1.57, as it may be amended in writing from time to
      time.

1.58   "RESEARCH TERM" shall have the meaning provided in Section 7.1(b)(iii).

1.59   "ROYALTY TERM" means with respect to (i) a given Primary Product in a
      given country the period of time commencing on Launch in such country and
      continuing until the later of (a) expiration of the last to expire of a
      Memory Patent Right or Composition of Matter

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

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      Claim Covering such Product in such country or (b) ten (10) years from the
      Launch of such Product in such country, and (ii) a given Secondary Product
      in a given country the period of time commencing on Launch in such country
      and continuing until ten (10) years from the Launch of such Product in
       such country. Notwithstanding the foregoing, with respect to any given
      Product that becomes a Primary Product in a given country subsequent to
      Launch in such country, the Royalty Term shall expire in such country upon
      the later of (x) expiration of the last to expire of a Memory Patent Right
      or Composition of Matter Claim Covering such Product in such country or
      (y) ten (10) years from the Launch of such Product in such country. The
      Launch within any country in the European Union shall be deemed the date
      of Launch for all countries in the European Union.

1.60   "SECONDARY COMPOUND" means (i) a PDE10 inhibitor or modulator, other than
      a Primary Compound, (a) for which Amgen during the Agreement Term has
      rights, whether by reason of its own conception of such inhibitor or
      modulator, or under agreement with a Third Party, (b) was identified or
      confirmed as a PDE10 inhibitor or modulator through the use of the Memory
      Screening Technology, and (c) subject to Section 7.3(a), with respect to
      which the initial IND for the inhibitor or modulator has not been filed
      within [*] after the Effective Date by Amgen or its Affiliate, or (ii) [*]
      or as identified by Memory on Schedule 1.60 attached hereto.

1.61   "SECONDARY PRODUCT" means a product that includes, in whole or as a
      component thereof, a Secondary Compound; PROVIDED, HOWEVER, that if a
      Product includes in whole or as a component thereof, a Primary Compound
      then such Product shall be deemed a Primary Product. No Product shall be
      deemed both a Primary Product and a Secondary Product concurrently.

1.62   "TERRITORY" means all countries and territories in the world.

1.63   "THIRD PARTY" means a person or entity other than (i) Memory or any of its
      Affiliates, or (ii) Amgen or any of its Affiliates.

1.64   "THIRD PARTY ACQUIRER" means a Third Party that obtains ownership or
      control of (whether directly or indirectly) or otherwise acquires all or
       substantially all of the business or assets of Memory in connection with a
      Change of Control of Memory, whether in one transaction or a series of
      transactions.

1.65   "TRIGGERING EVENT" means a [*] determination by [*] resulting from the
       performance of the research set forth in Schedule 1.65-A attached hereto
      that [*] and that such [*] the central nervous system effects described
      in Schedule 1.65-B.

1.66   "US" means the United States of America and its possessions and
       territories, including Puerto Rico.

1.67   "VALID CLAIM" means a claim [*].

                            ARTICLE 2. LICENSE GRANTS

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       10
<PAGE>

2.1    License Grants. Subject to the terms and conditions of this Agreement,
      Memory grants to Amgen the sole and exclusive license, including the right
      to grant sublicenses pursuant to Section 2.2, under the Memory Patent
      Rights, the Memory Know-How, the Memory Inventions and Memory Technology
      to perform Amgen's responsibilities under the Research Collaboration and
      to research, develop, make, have made, use, offer for sale, sell, have
      sold, import, export or otherwise exploit, or transfer possession of or
      title in, Compounds and Products in the Territory for use in the Field.

      Subject to the terms and conditions of this Agreement, Memory grants to
      Amgen the sole and exclusive license, including the right to grant
      sublicenses pursuant to Section 2.2, under its joint interest in Joint
      Patent Rights (other than with respect to General Inventions) to perform
      Amgen's responsibilities under the Research Collaboration and to research,
      develop, make, have made, use, offer for sale, sell, have sold, import,
      export or otherwise exploit, or transfer possession of or title in,
      Compounds and Products in the Territory for use in the Field.

      Subject to the terms and conditions of this Agreement, Memory grants to
      Amgen the sole and exclusive license, including the right to grant
      sublicenses pursuant to Section 2.2, under its joint interest in
      Collaboration Technology to research, develop, make, have made, use, offer
      for sale, sell, have sold, import, export or otherwise exploit, or
      transfer possession of or title in, products solely to the extent related
      to PDE10; PROVIDED, HOWEVER, that Memory and Amgen shall each have the
      non-exclusive right (including the right to grant sublicenses) under the
      Collaboration Technology to research, develop, make, have made, use, offer
      for sale, sell, have sold, import, export or otherwise exploit, or
      transfer possession of or title in, products except solely to the extent
      related to PDE10.

      During the Agreement Term, subject to the terms and conditions of this
      Agreement, Memory grants to Amgen a worldwide, fully paid-up,
      royalty-free, non-exclusive license, including the unrestricted right to
      grant sublicenses, under the Memory Inventions, and all intellectual
      property rights to the extent relating thereto, for any and all purposes.
      Upon expiration or termination of this Agreement, subject to the terms and
       conditions of this Agreement (including Section 12.1), Memory grants to
      Amgen and its Affiliates a worldwide, fully paid-up, royalty-free,
      non-exclusive license, with no right to grant sublicenses or assign such
      license, under the Memory Inventions to the extent relating to Memory
      compounds consisting of PDE10 inhibitors or modulators, including Memory
      Compounds and all intellectual property rights to the extent relating
      thereto solely for internal research purposes (the "RESEARCH LICENSE"),
      and Memory grants to Amgen and its Affiliates a worldwide, fully paid-up,
      royalty-free, non-exclusive license, including the unrestricted right to
      grant sublicenses, under any other Memory Invention (including General
      Inventions), and all intellectual property rights to the extent relating
      thereto, for any and all purposes.

      Amgen's right to use Memory's pre-existing technology and all intellectual
      property rights relating thereto pursuant to the licenses granted under
      this Section 2.1 shall be limited solely to Amgen's and its Affiliates'
      and sublicensees' use in connection with activities under this Agreement
      related to PDE10. Pursuant to the licenses granted under this Section 2.1,
      Amgen shall have exclusive rights to all technology and all intellectual

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       11
<PAGE>

      property rights to the extent relating thereto developed solely or jointly
      by Memory during the Research Collaboration for use solely in connection
      with activities under this Agreement related to PDE10, including Memory
      Inventions and Collaboration Technology, and non-exclusive rights relating
      thereto for activities unrelated to PDE10. Further, nothing in this
      Agreement shall limit the right of Memory to use Memory Know-How
      (including the Memory Screening Technology, but excluding Memory
      Inventions pursuant to which Amgen has been granted an exclusive license
      under the first paragraph of this Section 2.1) for any purpose except
      solely to the extent related to researching, developing, making, having
      made, using, offering for sale, selling, having sold, importing, exporting
      or otherwise exploiting, or transferring possession of or title in,
      Compounds and Products in the Territory for use in the Field.

2.2    Sublicense Rights. Except with respect to the Research License, the rights
      and licenses granted to Amgen under Section 2.1 shall include the
      unrestricted right to grant sublicenses to its Affiliates and Third
      Parties under such rights and licenses, in whole or in part. Amgen assumes
      full responsibility for the performance of all obligations and observance
      of all terms of this Agreement imposed on such Affiliate or Third Party
      sublicensee and will itself account to Memory for all payments due under
      this Agreement by reason of such sublicensee's activities.

      Upon the licenses granted herein to Amgen becoming fully paid up pursuant
      to Section 12.1, any and all sublicenses granted by Amgen similarly shall
      become fully paid up as to Memory.

2.3    Products Containing Amgen Compounds. Memory acknowledges that prior to the
      Effective Date Amgen has or, during the Agreement Term Amgen may have,
      rights in or to Amgen Compounds. For the purposes of this Agreement,
      "AMGEN COMPOUND" means a PDE10 inhibitor or modulator, other than a
      Primary Compound or Secondary Compound, (a) for which Amgen during the
      Agreement Term has rights, whether by reason of its own conception of such
      inhibitor or modulator, or under agreement with a Third Party, and (b) was
      not identified or confirmed as a PDE10 inhibitor or modulator through the
      use of the Memory Screening Technology.

      All rights in and to any Amgen Compound shall remain solely owned by
      Amgen, and Memory shall have no rights, and Amgen shall have no
      obligations, financial or otherwise, to Memory, under this Agreement with
      respect to any Amgen Compound.

2.4    No Implied License. No rights or licenses with respect to any intellectual
      property owned or Controlled by either party are granted or shall be
      deemed granted hereunder or in connection herewith, other than those
      rights or licenses expressly granted in this Agreement.

2.5    Exclusivity. Notwithstanding anything to the contrary in this Agreement,
      during the Agreement Term, Memory and its Affiliates will not, internally
      (other than in performance of the Research Workplan) or in conjunction
      with a Third Party, conduct, effect, participate in or cause, or advise,
      assist or encourage any Third Party (including, without limitation,
      through the transfer of information, materials or technology) to

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       12
<PAGE>

      conduct, effect, participate in or cause, in any way, directly or
      indirectly, any activities related to PDE10 inhibitors or modulators;
      PROVIDED, HOWEVER, that nothing contained herein shall prohibit any
      activity with respect to inhibitors or modulators of phosphodiesterases
      other than those that inhibit or modulate PDE10. For the purposes of this
      Section 2.5, Affiliates shall [*].

2.6    Registration. The Parties shall execute the short-form of license attached
      hereto as Schedule 2.6 concurrently with this Agreement. From time to time
      after the Effective Date, upon request by Amgen, Memory agrees to execute
      such similar short-forms of license to evidence the license of rights
      granted to Amgen by this Agreement. Amgen shall have the right to record
      such short-forms of license in the United States Patent and Trademark
      Office, the corresponding offices outside the United States, and/or with
      other appropriate governmental agencies. Amgen shall provide Memory with
       prompt written notice of any such recordation, including a copy of all
      papers recorded. Upon termination of the Agreement in its entirety for any
      reason, Amgen at its sole cost and expense shall promptly execute and
      deliver to Memory, or cause to be filed with the United States Patent and
      Trademark Office, the corresponding offices outside the United States,
      and/or with other appropriate governmental agencies, appropriate
      terminations of such short-forms of license.

                              ARTICLE 3. DILIGENCE

3.1    Amgen's Diligence. Amgen shall use reasonable diligence in proceeding with
      the research, development (including obtaining required Regulatory
      Approvals), manufacturing, marketing and sale of Products in the Major
      Market Countries.

      Reasonable diligence as used in this Agreement shall mean the same
      standard of effort as used by Amgen, or in any case not less than common
      in the industry taken as a whole, in the research, development, clinical
      testing, manufacturing, marketing and sale of a product of similar
      profile, market potential and at a similar stage in its product life as
      that of the applicable Product, taking into account safety, efficacy,
       competition, the patent and other proprietary position of the Product, the
      likelihood of Regulatory Approval given the regulatory structure involved,
      the profitability of the Product including the royalties payable to
      licensors of patent rights, alternative products and product candidates
      and other relevant factors, including scientific, business and marketing
      and return on investment considerations. The Parties also acknowledge
      that, even within the Major Market Countries, Amgen (and its Affiliates)
      does not always seek to market its own products in every such country or
      seek to obtain regulatory approval in every such country or for every
      potential indication or seek to obtain regulatory approvals in different
      countries concurrently. As a result, reasonable diligence shall be
      determined by judging Amgen's efforts taken as a whole in the following
      regions on a region-by-region basis (the regions being [*]) (taking into
      account factors including pricing strategy, applicable law and regulation
      and the availability and strength of protection for intellectual property
      and proprietary rights), and it is anticipated that the level of effort
      will change over time, reflecting changes in the status of the Product and
      the market and/or region involved and based upon changing scientific,
      business, marketing, return on investment and other considerations.
      Additionally, the Parties acknowledge that prior to Initiation of Phase 3

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       13
<PAGE>

      Clinical Trial conducted to support Regulatory Approval of a Product in
      the [*], Amgen shall have no diligence obligations under this Section 3.1
      with respect to [*].

3.2    Memory's Diligence. Memory shall use reasonable diligence, and shall
      commit the personnel, facilities and resources, to perform its obligations
      under the Research Workplan. Memory will conduct its activities under the
      Research Collaboration in good scientific manner, using qualified
      personnel, and in material compliance with applicable laws and
      regulations. Memory will prepare and maintain complete and accurate
      written records relating to its activities under the Research
      Collaboration consistent with industry standards including, for purposes
      of patent and regulatory matters, prompt, but in no event less than daily,
      signing and corroboration of laboratory notebooks and conception
      documents. Amgen shall have the right to use such source data to support
      submissions to regulatory agencies and the filing, prosecution,
      maintenance, defense and enforcement of Joint Patent Rights and for such
      other purposes as reasonably necessary in pursuit of performing Amgen's
      responsibilities under the Research Collaboration and researching,
      developing, making, having made, using, offering for sale, selling, having
       sold, importing, exporting or otherwise exploiting, or transferring
      possession of or title in, Compounds and Products in the Territory for use
      in the Field. Memory shall maintain such records for the later of (a) the
      Agreement Term or (b) five (5) years following the expiration or
      termination of the Research Collaboration. Upon Amgen's written request
      and within fifteen (15) business days after such request, Memory shall
      make available for inspection by the Amgen Audit Representative (as that
      term is defined in Section 7.3 hereof) the records of Memory (including
      source data such as laboratory notebook records) regarding the activities
      conducted and results achieved under the Research Collaboration, including
      all records related to Collaboration Technology and Inventions, at any
      reasonable time during Memory's regular working hours, and copies of all
      or any part of such data and records (whether in tangible or electronic
      form) shall be furnished to the Amgen Audit Representative upon request,
      provided that the Amgen Audit Representative shall execute a
      confidentiality agreement of the type described in Section 7.3 prior to
      the Amgen Audit Representative exercising any such rights. The rights and
      obligations contained in the preceding sentence shall survive for the
      later of (a) the Agreement Term or (b) five (5) years after the expiration
      or termination of the Research Collaboration.

3.3    Use of Memory Screening Technology. After the occurrence of the Triggering
      Event, Amgen shall [*] the Memory Screening Technology with respect to its
      use in the Research Collaboration, [*].

                          ARTICLE 4. PAYMENTS TO MEMORY

4.1    Up-Front Payment. Subject to Section 12.2, Amgen shall pay Memory an
      up-front payment of five million dollars ($5,000,000), which shall be
      non-refundable and non-creditable. Payment for such up-front fee shall be
      made within thirty (30) days following the Effective Date.

4.2       Triggering Event. Upon the occurrence of the Triggering Event, Amgen
         shall pay Memory a payment of [*] dollars ($[*]), which shall be
         non-refundable and non-

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       14
<PAGE>

      creditable. Upon the occurrence of the Triggering Event, Amgen shall
      notify Memory of such occurrence, and Memory will invoice Amgen for such
      payment. Such payment shall be due and payable by Amgen within [*] days
      after receipt of the applicable invoice from Memory. Amgen shall use
      reasonable diligence to cause the Triggering Event to occur as soon as
      reasonably practicable. If, within [*] days from the date hereof, the
      Triggering Event has not occurred, Memory shall have the right, at
      Memory's expense, to, and/or the right to cause a Third Party to, [*]. The
      Triggering Event shall only be deemed to have occurred if [*] results in
      the occurrence of the Triggering Event. The Parties confirm that the
      absence of the Triggering Event shall not eliminate, reduce or otherwise
      modify any obligation to make any milestone payments or royalty payments
      hereunder (other than the payment provided for in this Section 4.2).

4.3    Milestone Payments. (a) Amgen shall pay to Memory each of the following
      applicable one-time milestone payments following achievement of the
      corresponding milestone event by Amgen, its Affiliates or sublicensees,
      and all such payments shall be nonrefundable and non-creditable, except to
      the extent expressly set forth in this Section 4.3 or Section 6.5.

<TABLE>
<CAPTION>
                            MILESTONE PAYMENT     MILESTONE PAYMENT
      MILESTONE EVENT        (PRIMARY PRODUCT)    (SECONDARY PRODUCT)
-------------------------    -----------------    -------------------
<S>                          <C>                  <C>
[*]                                US$[*]                 US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

[*]                                US$[*]                US$[*]

TOTAL                              US$[*]                US$[*]
</TABLE>

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       15

<PAGE>

(b)    Notwithstanding Section 4.3(a) but subject to Section 4.3(g) and Section
      5.9, in the event that either:

      (i)    a Primary Product has a black box warning, in the US or the European
            Union, in its label at time of Launch in the US or the European
            Union, respectively, or receives one during its first [*] after
            Launch in the US or the European Union, respectively;

      (ii)   a "Dear Doctor" letter is issued in the US or the European Union,
            respectively, in relation to such Primary Product during such
            period;

      (iii) a Primary Product is not the first or second PDE10 inhibitor or
            modulator (excluding any Secondary Product) having regulatory
            approval for the treatment of [*] in the US or the European Union,
            respectively; or

      (iv)   a third PDE10 inhibitor or modulator (excluding any Product) having
            regulatory approval for the treatment of [*] launches in the US or
            the European Union, respectively, during the [*] period following
            the Launch of the Primary Product in the US or the European Union,
            respectively,

      then with respect to any such event in the US the milestone payment
      payable for such Primary Product upon approval of an NDA for such Primary
      Product in the US shall be reduced to $[*] (PROVIDED, HOWEVER, that, if
      such event occurs with respect to the US within [*] after Launch in the US
      then Amgen shall be entitled to deduct $[*] from subsequent payments of
      royalties to Memory), and with respect to any such event in the European
       Union the milestone payment payable for such Primary Product upon approval
      of an NDA for such Primary Product in the European Union shall be reduced
      to $[*] (PROVIDED, HOWEVER, that, if such event occurs with respect to the
      European Union within [*] after Launch in the European Union then Amgen
      shall be entitled to deduct $[*] from subsequent payments of royalties to
      Memory).

(c)    Notwithstanding Section 4.3(a) but subject to Section 4.3(g) and Section
      5.9, in the event that either:

      (i)    a Secondary Product has a black box warning, in the US or the
            European Union, in its label at time of Launch in the US or the
            European Union, respectively, or receives one during its first [*]
             after Launch in the US or the European Union, respectively;

      (ii)   a "Dear Doctor" letter is issued in the US or the European Union,
            respectively, in relation to such Secondary Product during such
            period;

      (iii) a Secondary Product is not the first or second PDE10 inhibitor or
            modulator having regulatory approval for the treatment of [*] in the
            US or the European Union, respectively; or

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       16
<PAGE>

      (iv)   a third PDE10 inhibitor or modulator (excluding any Product) having
            regulatory approval for the treatment of [*] launches in the US or
            the European Union, respectively, during the [*] period following
            the Launch of the Secondary Product in the US or the European Union,
            respectively,

      then with respect to any such event in the US the milestone payment
      payable for such Secondary Product upon approval of an NDA for such
      Secondary Product in the US shall be reduced to $[*] (PROVIDED, HOWEVER,
      that, if such event occurs with respect to the US within [*] after Launch
      in the US then Amgen shall be entitled to deduct $[*] from subsequent
      payments of royalties to Memory), and with respect to any such event in
      the European Union the milestone payment payable for such Secondary
      Product upon approval of an NDA for such Secondary Product in the European
      Union shall be reduced to $[*] (PROVIDED, HOWEVER, that, if such event
      occurs with respect to the European Union within [*] after Launch in the
      European Union then Amgen shall be entitled to deduct $[*] from subsequent
      payments of royalties to Memory).

(d)

      (i)    Upon the occurrence of a milestone event, Amgen shall promptly
            notify Memory of such occurrence, and Memory will invoice Amgen for
            the related payment. Such payment shall be due and payable by Amgen
             within [*] days after receipt of the applicable invoice from Memory.

      (ii)   Notwithstanding Section 4.3(d)(i), except as provided in the next
            sentence, a Product that includes, in whole or as a component
            thereof, a Collaboration Compound shall be presumed to be a
            Secondary Product until such time as it is determined to be a
            Primary Product. An inhibitor or modulator of PDE10 comprising a
            composition of matter claimed in a patent application within a
            Memory Patent Right or a Joint Patent Right shall, prior to Launch,
            be presumed to be a Primary Product.

      (iii) If at the time of Launch no Valid Claim under a Memory Patent Right
            or a Composition of Matter Claim Covers such Product, then, subject
            to Section 5.9, Amgen shall be entitled to deduct from subsequent
            payments of royalties to Memory the difference between the milestone
            payments actually paid for such Product and the milestone payments
            that would have otherwise been paid for such Product, if any, by
            Amgen but for the presumption provided for in Section 4.3(d)(ii).

      (iv)   If a Valid Claim under a Memory Patent Right or a Composition of
            Matter Claim subsequently Covers such Product, then Amgen shall
            promptly reimburse Memory for the amounts deducted pursuant to
            Section 4.3(d)(iii).

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                        17
<PAGE>

            (v)    Amgen shall only be obligated to make each milestone payment
                  once, for the first occurrence of a respective event,
                  regardless of how many times the event may be subsequently
                  achieved with one or more Products.

            (vi)   If Amgen's obligation to pay Memory for an occurrence of an
                  event for a Secondary Product arises, and subsequently,
                  Amgen's obligation to pay Memory for an occurrence of a
                  corresponding event for a Primary Product should arise, then
                  Amgen shall be required to pay Memory, promptly after such
                  occurrence of the corresponding event for a Primary Product,
                  an amount equal to the difference between the amount payable
                  for such event for a Primary Product and the amount previously
                  paid for such event as a Secondary Product. Accordingly,
                  should Amgen's obligation to pay Memory for an occurrence of
                  an event for a Primary Product arise, then Amgen's obligation
                  to pay Memory for a corresponding event for a Secondary
                  Product shall expire.

      (e)    In the event that a milestone event relating to clinical development
            is achieved and payment with respect to the previous milestone
            event(s) has not been made by Amgen, then Amgen shall promptly pay
            Memory all such unpaid payments with respect to such previous
            milestone event(s).

      (f)    In no event shall Amgen be obligated to pay to Memory milestone
            payments in excess of $[*] in the aggregate for the achievement of
            all milestone events, regardless of how many times milestone events
            are achieved and regardless of whether they are achieved by Primary
            Products, Secondary Products or both.

      (g)    Notwithstanding the foregoing provisions of this Section 4.3, if
            during any Calendar Year after the Launch of a Product with respect
            to which the milestone payments have been reduced pursuant to
            Section 4.3(b) or (c) hereof the annual worldwide Net Sales of such
            Product exceed US$[*], Amgen shall promptly pay to Memory the amount
            of such reduction in the milestone payments, but in any event within
            [*] days following the end of such Calendar Year.

                               ARTICLE 5. ROYALTIES

5.1    Royalties Payable by Amgen.

      (a)    Primary Products. With respect to each Calendar Year (or portion
            thereof) during the Royalty Term of a Primary Product, Amgen shall
            pay to Memory royalties on total annual Net Sales of such Primary
            Product in such Calendar Year (or portion thereof) by Amgen, its
            Affiliates and its sublicensees, which royalties shall be at the
            following rates:

            (i)    [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is less than or equal to US$[*];

            (ii)   [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is greater than US$[*] and less
                  than or equal to US$[*]; and

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       18
<PAGE>

            (iii) [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is greater than US$[*].

      (b)    Secondary Products. With respect to each Calendar Year (or portion
            thereof) during the Royalty Term of a Secondary Product, Amgen shall
             pay to Memory royalties on total annual Net Sales of such Secondary
            Product in such Calendar Year (or portion thereof) by Amgen, its
            Affiliates and its sublicensees, which royalties shall be at the
            following rates:

             (i)    [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is less than or equal to US$[*];

            (ii)   [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is greater than US$[*] and less
                  than or equal to US$[*]; and

            (iii) [*] percent ([*]%) of that portion of such total annual Net
                  Sales of such Product that is greater than US$[*].

       (c)    Subsequent Events. Notwithstanding the foregoing, a Product may
            change from time to time from a Primary Product to a Secondary
            Product and vice versa. Royalties for Primary Products shall be
            payable at the applicable rates set forth in Section 5.1(a) until
            the beginning of the first Calendar Quarter following the Calendar
            Quarter in which such Product has been determined to be a Secondary
            Product at which time royalties for such Product shall be payable at
            the applicable rates set forth in Section 5.1(b), and royalties for
            Secondary Products shall be payable at the applicable rates set
            forth in Section 5.1(b) until the beginning of the first Calendar
            Quarter following the Calendar Quarter in which such Product has
            been determined to be a Primary Product at which time royalties for
            such Product shall be payable at the applicable rates set forth in
            Section 5.1(a).

5.2    Royalty Term; Royalty Rate; Net Sales. Royalties for sales of any Product
      shall be paid for a period equal to the Royalty Term for such Product. If
      a Memory Patent Right or a Joint Patent Right has been found to be
      unpatentable, invalid or unenforceable by a court or other authority of
      competent jurisdiction in the country in which a Patent Right has issued,
      as a result of which Amgen is no longer required to pay royalties for a
      Product in such country, and subsequently such ruling is reversed upon
      appeal and such Patent Right is thereafter not subject to such
      determination of unpatentability, invalidity or unenforceability, then
      [*]. The royalty rates set forth above shall be determined on a
      Product-by-Product basis. [*] Nothing contained in this Section 5.2 shall
      affect the obligations of Amgen under Section 3.1. Additionally, when
      determining annual Net Sales of any given Product, the total annual Net
      Sales of such Product shall be the total annual Net Sales of such Product
      in all countries in which the Royalty Term is in effect for such Product
      (and shall only include sales made while such Royalty Term is in effect).

5.3       Third Party Licenses. If Amgen reasonably determines, in its reasonable
         discretion, that in order to avoid the potential infringement of the
         patent or know-how rights of a Third

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                        19
<PAGE>

      Party or Third Parties one or more licenses to access such intellectual
      property rights of a Third Party or Third Parties are required for Amgen,
      its Affiliates and/or its sublicensees to research, develop, make, have
      made, use, import, offer to sell and/or sell, export or otherwise exploit,
      or transfer physical possession of or title in a Product ("THIRD PARTY
      LICENSE(s)"), then [*] of any compensation (including, without limitation,
       up-front payments, milestones and royalties) actually paid by Amgen, its
      Affiliates and/or sublicensees with respect to such Product under any such
      Third Party License(s) entered into by Amgen, its Affiliates or
      sublicensees shall be creditable against the royalty payments to be paid
      to Memory by Amgen hereunder with respect to the sale of such Product;
      PROVIDED, HOWEVER, that the royalty rates due to Memory under Section
      5.1(a) in any given Calendar Year will not be reduced to less than [*];
      FURTHER PROVIDED, HOWEVER, that the royalty rates due to Memory under
      Section 5.1(b) in any given Calendar Year will not be reduced to less than
      [*].

5.4    Cumulative Royalties. The obligation under Section 5.1 to pay royalties on
      the Net Sales of a Product shall be imposed only once with respect to the
      same unit of said Product.

5.5    No Other Compensation. Other than as explicitly set forth (and as
      applicable) in this Article 5, and in Article 4 and Section 7.3, Amgen
      shall not be obligated to pay any additional fees, milestone payments,
      royalties or any other compensation to Memory under this Agreement.

5.6    Cross License. In the event that Amgen, in its sole business judgment,
       shall determine it is reasonably necessary to grant a sublicense, or a
      covenant not to sue, under Memory Patent Rights claiming a Product or
      method of using a Product, to any Third Party in a country in order for
      Amgen to obtain the right to make, have made, use, sell, lease, offer to
      sell or lease, or import, export or otherwise exploit, transfer physical
      possession of or otherwise transfer title in such Product in the Field in
      any case where any one or more such activities by Amgen, its Affiliates or
      sublicensees otherwise may infringe the intellectual property rights of
      such Third Party, and wherein no compensation or consideration other than
      the cross-licenses is exchanged between Amgen and such Third Party as a
      result thereof, Amgen shall have the right to grant such sublicense or
      covenant not to sue to such Third Party solely in connection with the
      manufacture, use, sale or other commercialization of an inhibitor or
      modulator of PDE10. For purposes of this Section 5.6, the determination of
      Net Sales of Products for purposes of calculating the royalties payable by
      Amgen to Memory under Section 5.1 shall not include sales of such
      inhibitor or modulator of PDE10 by or on behalf of such Third Party (or
      its Affiliates or sublicensees) receiving such sublicense or covenant not
      to sue.

5.7    Adjustments Related to Third Party Competition.

      (a)    For a given Primary Product in a given Calendar Quarter, if, in
            addition to such Primary Product, there are [*] PDE10 inhibitors or
            modulators (excluding any Product) having regulatory approval for
            the treatment of [*] in the US, then Amgen shall have the right to
             reduce for the entire Territory the applicable royalty rate provided
            for under Section 5.1(a) to [*] percent ([*]%) of the applicable Net
            Sales in clause (i), [*] percent ([*]%) of the applicable Net

                    [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       20
<PAGE>

            Sales in clause (ii), and [*] percent ([*]%) of the applicable Net
            Sales in clause (iii).

      (b)    Additionally, so long as there are [*] PDE10 inhibitors or
            modulators (excluding any Product) having regulatory approval for
            the treatment of [*] in the US, the minimum royalty rates provided
            for under Section 5.3 due to Memory for royalties payable under
             Section 5.1(a) in any given Calendar Year may be further reduced by
            Amgen to not less than [*] percent ([*]%) of the applicable annual
            Net Sales in clause (i), [*] percent ([*]%) of the applicable annual
            Net Sales in clause (ii), and [*] percent ([*]%) of the applicable
            annual Net Sales in clause (iii).

      (c)    For a given Secondary Product in a given Calendar Quarter, if, in
            addition to such Secondary Product, there are [*] PDE10 inhibitors
            or modulators (excluding any Product) having regulatory approval for
            the treatment of [*] in the US, then Amgen shall have the right to
            reduce for the entire Territory the applicable royalty rate provided
             for under Section 5.1(b) to [*] percent ([*]%) of the applicable Net
            Sales in clause (i), [*] percent ([*]%) of the applicable Net Sales
            in clause (ii), and [*] percent ([*]%) of the applicable Net Sales
            in clause (iii).

      (d)    Additionally, so long as there are [*] PDE10 inhibitors or
            modulators (excluding any Product) having regulatory approval for
            the treatment of [*] in the US, the minimum royalty rates provided
            for under Section 5.3 due to Memory for royalties payable under
            Section 5.1(b) in any given Calendar Year may be further reduced by
            Amgen to not less than [*] percent ([*]%) of the applicable annual
            Net Sales in clause (i), [*] percent ([*]%) of the applicable annual
            Net Sales in clause (ii), and [*] percent ([*]%) of the applicable
            annual Net Sales in clause (iii).

      (e)    Notwithstanding the foregoing provisions of this Section 5.7, if
            during any Calendar Year after the Launch of a Product, the annual
            worldwide Net Sales of such Product exceed US$[*], the reductions
            provided for in this Section 5.7 as to such Product shall terminate
            for the Calendar Year in which such Net Sales amount is achieved and
            all future Calendar Years.

5.8    Adjustments Related to Black Box Label and "Dear Doctor" letters.

      (a)    For a given Primary Product in a given Calendar Quarter in which
            there is a black box warning in the US as referred to in clause (1)
            below or a "Dear Doctor" letter in the US as referred to in clause
            (2) below (and for every Calendar Quarter thereafter until and
            unless such black box warning or "Dear Doctor" letter is removed or
            withdrawn), if, (1) in the US the Primary Product has a black box
            warning in its label or (2) there should be any "Dear Doctor"
            letters issued in the US regarding such Primary Product, Amgen shall
            have the right to reduce for the entire Territory the applicable
            royalty rate provided for under Section 5.1(a) to [*] percent ([*]%)
            of the applicable Net Sales in clause (i), [*] percent ([*]%) of the
             applicable Net Sales in clause (ii), and [*] percent ([*]%) of the
            applicable Net Sales in clause (iii).

                     [*] CONFIDENTIAL TREATMENT IS REQUESTED

                                       21
<PAGE>

      (b)    Additionally, during the continuance of a black box warning in the
            US or a "Dear Doctor" letter in the US, the minimum royalty rates
            provided for under Section 5.3 due to Memory for royalties payable
            under Section 5.1(a) in any given Calendar Year may be further
            reduced by Amgen to not less than [*] percent ([*]%) of the
            applicable annual Net Sales in clause (i), [*] percent ([*]%) of the
            applicable annual Net Sales in clause (ii), and [*] percent ([*]%)
            of the applicable annual Net Sales in clause (iii).

      (c)    For a given Secondary Product in a given Calendar Quarter in which
            there is a black box warning in the US as referred to in clause (1)
            below or a "Dear Doctor" letter in the US as referred to in clause
            (2) below (and for every Calendar Quarter thereafter until and
            unless such black box warning or "Dear Doctor" letter is removed or
            withdrawn), if, (1) in the US the Secondary Product has a black box
            warning in its label or (2) there should be any "Dear Doctor"
            letters issued in the US regarding such Secondary Product, Amgen
            shall have the right to reduce for the entire Territory the
            applicable royalty rate provided for under Section 5.1(b) to [*]
            percent ([*]%) of the applicable Net Sales in clause (i), [*]
            percent ([*]%) of the applicable Net Sales in clause (ii), and [*]
            percent ([*]%) of the applicable Net Sales in clause (iii).

      (d)    Additionally, during the continuance of a black box warning in the
            US or a "Dear Doctor" letter in the US, the minimum royalty rates
            provided for under Section 5.3 due to Memory for royalties payable
            under Section 5.1(b) in any given Calendar Year may be further
            reduced by Amgen to n


 
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