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RESEARCH AND LICENSE AGREEMENT

License Agreement

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Title: RESEARCH AND LICENSE AGREEMENT
Governing Law: New York     Date: 3/20/2006
Industry: Biotechnology and Drugs     Law Firm: Ropes & Gray LLP    

RESEARCH AND LICENSE AGREEMENT, Parties: combinatorx  incorporated
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                                                                   Exhibit 10.42

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                          RESEARCH AND LICENSE AGREEMENT

                                     BETWEEN

                            FOVEA PHARMACEUTICALS SA

                                       AND

                            COMBINATORX, INCORPORATED

                              DATED JANUARY 30, 2006

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                                TABLE OF CONTENTS

<Table>
<S>                                                                       <C>
ARTICLE 1 DEFINITIONS ....................................................1

ARTICLE 2 GRANT OF RIGHTS ...............................................14

ARTICLE 3 COLLABORATION COMBINATIONS ....................................18

ARTICLE 4 LICENSED COMBINATIONS .........................................26

ARTICLE 5 CONSIDERATION .................................................27

ARTICLE 6 INTELLECTUAL PROPERTY .........................................32

ARTICLE 7 ENFORCEMENT AND DEFENSE OF PATENTS ............................37

ARTICLE 8 CONFIDENTIALITY AND NON-DISCLOSURE ............................39

ARTICLE 9 REPRESENTATIONS, WARRANTIES AND COVENANTS .....................43

ARTICLE 10 INDEMNITY ....................................................45

ARTICLE 11 TERM AND TERMINATION .........................................49

ARTICLE 12 DISPUTE RESOLUTION ...........................................52

ARTICLE 13 MISCELLANEOUS ................................................53
</Table>

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                         RESEARCH AND LICENSE AGREEMENT

          This Research and License Agreement (the "Agreement") is dated as of
January 30, 2006 (the "Effective Date") and is between Fovea Pharmaceuticals SA,
a company organized and existing under the laws of, France, with an office at
3-5 Impasse Reille, 75014 Paris, France ("Fovea"), and CombinatoRx,
Incorporated, a company organized and existing under the laws of Delaware, with
an office at 650 Albany Street, Boston, MA 02118 ("CombinatoRx"). Each of Fovea
and CombinatoRx are sometimes referred to herein as a "Party" and together as
the "Parties."

                                    RECITALS

     (A) CombinatoRx has expertise in discovery and development of combination
         drugs, and has drug combinations in discovery, preclinical and clinical
         stages of development.

     (B) Fovea has certain proprietary IN VITRO and IN VIVO models of ophthalmic
         diseases, and clinical expertise in developing ophthalmic therapeutics.

     (C) The Parties wish to collaborate on certain Collaboration Combinations
         (defined herein) wherein Fovea would test certain of CombinatoRx's drug
         combinations in the ophthalmic disease models to identify candidates
         for commercialization by the Parties in certain territories.

     (D) Fovea also desires to obtain an exclusive, royalty-bearing license, and
         CombinatoRx desires to grant such license, under certain intellectual
          property relating to Licensed Combinations (defined herein) for
         commercialization by Fovea.

                                    AGREEMENT

          NOW, THEREFORE, in consideration of the mutual covenants contained in
this Agreement, and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Parties, intending to be
legally bound, hereby agree as follows:

                                    ARTICLE 1
                                   DEFINITIONS

Unless otherwise specifically provided herein, the following terms, when used
with a capital letter at the beginning, shall have the following meanings:

          1.1      "AAA" has the meaning set forth in Section 12.3.

          1.2      "ACTIVE INGREDIENT" means any component of a drug product
intended to furnish pharmacological activity or other direct effect in the
Treatment of disease, or to affect the structure or any function of the body of
humans or other animals.

          1.3      "AFFILIATE" means, with respect to a Person, any other Person
that controls, is controlled by or is under common control with, such first
Person. For purposes of this definition only, "control" means (a) to possess,
directly or indirectly, the power to direct the

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management or policies of a Person, whether through ownership of voting
securities, by contract relating to voting rights or corporate governance or
otherwise, or (b) to own, directly or indirectly, more than fifty percent (50%)
of the outstanding voting securities or other voting ownership interest of such
Person or such lesser maximum ownership percentage permitted in those
jurisdictions restricting foreign ownership.

          1.4      "APPLICABLE LAW" means the laws, rules and regulations,
including any rules, regulations, guidelines or other requirements of Regulatory
Authorities, in effect from time to time within a country or territory, as
applicable.

          1.5      "BOE DISEASE" means the following diseases: Wet Age-related
Macular Degeneration; Dry Age-related Macular Degeneration; Posterior uveitis
(chorioentinitis); Retinitis Pigmentosa; Retinal Vein Occlusion; Retinal
detachment; Retinal Artery Occlusion; Proliferative diabetic retinopathy;
Post-operative inflammation; Persistant Macular Edema; Neovascular diseases
involving the retina or uveal tract such as neovascular glaucoma,
neovascularization following a combined vitrectomy and lensectomy,
neovascularization of the optic nerve, and neovascularization due to penetration
of the eye or contusive ocular injury; Inflammation due to ocular trauma;
Open-angle glaucoma; Closed-angle glaucoma; Exudative macular edema; Diabetic
Retinopathy; Diabetic Macular Edema; Cystoid macular edema; Chronic posterior
uveitis; Allograft rejection; Behcet's syndrome; Chorioiditis; Crystalline
retinopathy; Optic neurtitis; Proliferative sickle cell retinopathy;
Proliferative vitreoretinopathy; Retinopathy of prematurity; Vitreitis; Temporal
arteritis; Fuchs' Dystrophy; Dacryocystitis; Giant cell arteritis; Sympathetic
ophthalmia; Pars planitis; Pan Uveitis; and all other similar diseases as agreed
to by the Joint Steering Committee.

          1.6      "BREACHING PARTY" has the meaning set forth in Section 11.2.

          1.7      "CALENDAR QUARTER" means each successive period of three (3)
calendar months commencing on January 1, April 1, July 1 and October 1.

          1.8      "CALENDAR YEAR" means each successive period of twelve (12)
calendar months commencing on January 1.

          1.9      "CHALICE DATABASE" means CombinatoRx's proprietary database
containing data related to Combinations screened by or on behalf of CombinatoRx,
including the results of such screens, as such database exists on the Effective
Date, excluding any Information in such database resulting from any Third Party
Agreement. The Chalice Database includes all drug combinations that CombinatoRx
has in clinical studies as of the Effective Date.

          1.10     "CM" means a Cytokine Modulator as a therapeutic drug
containing a single active pharmaceutical ingredient or two or more active
pharmaceutical ingredients where no component of the CM is tacrolimus,
cyclosporine, ISAtx24, Rapamycin (Sirolimus), Pimecrolimus, Everolimus or a
corticosteroid.

          1.11     "COLLABORATION COMBINATION" means any drug combination in the
Chalice Database that consists of one of the following types of combinations:
SSAs, ECIs or CMs.

          1.12     "COLLABORATION COMBINATION FIELD" means use of a Collaboration
Combination by Local Administration to treat the diseases indicated below:

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<Table>
<Caption>
          Type of
          Collaboration
          Combination                Disease
          -----------                -------
          <S>                        <C>
          SSA                        BOE Disease

          ECI                        FOE Disease

          CM                          FOE Disease and/or
                                    BOE Disease
</Table>

          For clarification, each Collaboration Combination type is licensed
          solely for the treatment of the corresponding disease indicated above.

           1.13     "COLLABORATION COMBINATION PAIR" has the meaning set forth in
Section 3.3.2.

          1.14     "COLLABORATION COMBINATION IP" means, with respect to a
particular Collaboration Combination, any Intellectual Property (i) conceived by
either Party prior to the termination of the Evaluation Period for such
Collaboration Combination, including any such Intellectual Property existing on
the Effective Date, and (ii) relating to or covering the composition,
manufacture, use or sale of a Collaboration Combination, and which may be
necessary or useful in developing, making, using, or selling a Selected
Collaboration Product in the Collaboration Combination Field. Specifically
excluded from Collaboration Combination IP is Intellectual Property pertaining
to Formulation Technology, as defined in Section 3.8.1.

          1.15     "COLLABORATION SELECTION PERIOD" has the meaning set forth in
Section 3.3.2.

          1.16     "COMBINATION" refers either to Collaboration Combination or
Licensed Combination.

           1.17     "COMBINATION ASSESSMENT DATA" means the following: (i) the
identity of the Collaboration Combinations and Licensed Combinations; (ii) the
identity of each component of the Collaboration Combinations and Licensed
Combinations; (iii) Patents Controlled by CombinatoRx covering the Collaboration
Combinations and Licensed Combinations, to the extent necessary to Exploit
Collaboration Combinations and Licensed Combinations in the Collaboration
Combination Field and Licensed Combination Field; and (iv) summary of all
material CombinatoRx scientific data on the Collaboration Combinations and
Licensed Combinations, including research, preclinical information, and if
available, a copy of the Investigator's Brochure, to the extent necessary or
useful to Exploit Collaboration Combinations and Licensed Combinations in the
Collaboration Combination Field and Licensed Combination Field.

          1.18     "COMBINATORX BACKGROUND TECHNOLOGY" means (a) CombinatoRx's
drug discovery technology (including CombinatoRx's combination high throughput
screening platform) and any Information related thereto Controlled by
CombinatoRx or its Affiliates as of the Effective Date or thereafter; (b)
Improvements made to CombinatoRx's drug discovery technology by or on behalf of
CombinatoRx and its Affiliates and/or by or on behalf of Fovea and its
Affiliates; (c) the Chalice Database and any other discovery, invention, assay,

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products, cultures, biological materials, drugs, drug-device combinations and
other materials and compositions, Controlled by CombinatoRx or its Affiliates as
of the Effective Date or thereafter, (d) any Information related to a
Combination that is conceived or developed by or on behalf of CombinatoRx and
its Affiliates outside of this Agreement; and (e) Intellectual Property
pertaining to any of the foregoing.

          1.19     "COMBINATORX COLLABORATION COMBINATION IP" means Collaboration
Combination IP that is conceived by CombinatoRx or Third Parties acting on
behalf of CombinatoRx or jointly by CombinatoRx and Fovea or Third Parties
acting on behalf of the Parties.

          1.20     "COMBINATORX GENERATED DATA" means data generated and
Controlled by CombinatoRx relating to a Combination.

          1.21     "COMBINATORX LICENSED COMBINATION IP" means any Intellectual
Property (i) conceived by CombinatoRx and (ii) relating to or covering a
Licensed Combination, and which is necessary in developing, using, selling or
registering a Selected Licensed Product. All CombinatoRx Licensed Combination IP
shall be solely owned by CombinatoRx.

          1.22     "COMBINATORX TERRITORY" means North America, Singapore and
South Korea.

          1.23     "COMMERCIALLY REASONABLE EFFORTS" means, with respect to the
research, development, Manufacture or commercialization of a Selected
Collaboration Products and Selected Licensed Products licensed herein, as the
case may be, efforts and resources commonly used in the research-based
pharmaceutical industry for products with similar commercial and scientific
potential at a similar stage in their lifecycle, taking into consideration their
safety and efficacy, their cost to develop, the competitiveness of alternative
products, the anticipated or actual nature and extent of their market
exclusivity (including Patent coverage and regulatory exclusivity), the
likelihood of regulatory approval, and their estimated profitability, including
the amounts of marketing and promotional expenditures and all other relevant
factors.

          1.24     "COMPLAINING PARTY" has the meaning set forth in Section 11.2.

          1.25     "CONDITION" shall mean any malady, disease, syndrome, trauma,
injury or condition.

          1.26     "CONFIDENTIAL INFORMATION" has the meaning set forth in
Section 8.1.1.

          1.27     "CONTROL" means, with respect to any item, Combination,
Information, Patent or Intellectual Property Protection Right, possession of the
right, whether directly or indirectly, and whether by ownership, license or
otherwise, to assign, or grant a license, sublicense or other right to or under,
such item, Combination, Information, or Intellectual Property and has the right
to disclose such item, Combination, Information, Patent or Intellectual Property
as provided for herein without violating the terms of any agreement with a Third
Party, except to the extent that any of the foregoing rights arise by virtue of
the grant of rights under this Agreement.

          1.28     "DETAILED DEVELOPMENT PLAN" means the development plan to be
established with respect to each Selected Collaboration Combination pursuant to
Section 3.1 hereof and

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containing the activities to be undertaken by Fovea to enable Fovea to deliver a
Target Dossier in accordance with the terms of this Agreement. Without limiting
the foregoing, the Detailed Development shall provide for the following
development steps for each Selected Collaboration Combination, as applicable:

                      (a)      The Selected Collaboration Combination shall enter
                              formulation development;

                      (b)      If the Selected Collaboration Combination can be
                               formulated for ophthalmic use, it shall be
                              advanced to ocular tolerability experiments;

                      (c)      If the Selected Collaboration Combination has
                              acceptable ocular tolerability properties, it
                              shall be advanced to animal proof-of-concept
                              efficacy models;

                      (d)      If the Selected Collaboration Combination is
                              efficacious in animal models it shall be advanced
                              to ocular toxicity and pharmacokinetic studies;

                      (e)      If the Selected Collaboration Combination is
                              tolerable, non-toxic, efficacious, and can be
                              formulated for ophthalmic use, it shall be
                              advanced to a Phase I human
                              toxicity/pharmacokinetic study; and

                      (f)      If the Selected Collaboration Combination is
                              non-toxic and has acceptable pharmacokinetic
                              properties in humans, all shall be advanced to a
                              human proof-of-concept study (e.g. Phase IIa).

                      (g)      If the Selected Collaboration Combination is
                              efficacious in human proof-of-concept studies,
                              then at least one such Selected Collaboration
                               Combination shall be advanced to Phase IIb studies
                              as determined by the Joint Steering Committee
                              pursuant to Section 3.9.1.

          1.29     "DISCLOSING PARTY" has the meaning set forth in Section
10.1.1.

          1.30     "DISTRIBUTOR" has the meaning set forth in Section 2.4.

          1.31     "DOLLARS" means the lawful currency of the United States of
America.

          1.32     "ECI" means an Enhanced Calcineurin Inhibitor as a therapeutic
drug containing two or more active pharmaceutical ingredients where one of the
pharmaceutical ingredients is tacrolimus, cyclosporine, ISAtx24, Rapamycin
(Sirolimus), Pimecrolimus and Everolimus.

          1.33     "EMEA" means the European Agency for Evaluation of Medical
Products or any successor thereto.

          1.34     "EVALUATION PERIOD" means the period described in Section 3.4.

          1.35     "EXPLOIT," "EXPLOITING" or "EXPLOITATION" means to make, use,
offer for sale, sell and import, including, without limitation, to research,
develop, formulate, modify,

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enhance, improve, optimize, Manufacture, hold/keep for inventory, lease, rent,
distribute, promote, market, export, or otherwise dispose of or make available
or deal in respect of, a product or process, or have an Affiliate or Third Party
do any of the foregoing on behalf of a Party.

          1.36     "FDA" means the United States Food and Drug Administration and
any successor agency thereto.

          1.37     "FIRST COMMERCIAL SALE" means the first sale for monetary
value for use or consumption by a member of the general public of a Selected
Licensed Product in any country in the world after receipt of all Regulatory
Approvals for the sale of such product has been obtained in such country. For
the avoidance of doubt, sales prior to receipt of all Regulatory Approvals, such
as so-called "treatment IND sales," "named patient sales" and "compassionate use
sales," shall not be construed as a First Commercial Sale.

          1.38     "FOE DISEASE" means the following diseases:
Keratoconjunctivitis Sicca, also known as Dry Eye; Keratoconjunctivitis Sicca
due to Sjogren's Syndrome; Post-Surgical Inflammation; Vernal
keratoconjunctivitis; Anterior Uveitis (iridocyclitis); Ophthalmic infections of
the eye resulting in inflammation of the conjunctiva (conjunctivitis) by
staphylococci, streptococci, enterococci, euterococci, bacillus,
corynebacterium, chlamydia, and neisseria and inflammation of the cornea
(keratitis) caused by the same organisms; ophthalmic infections of the eye
resulting in inflammation (e.g., corneal herpes, bacterial keratitis, bacterial
conjunctivitis, mycotic keratitis, acanthamebic keratitis, infectious
endophthalmitis, infectious corneal ulcer and the like); Inflammation due to
ocular trauma; Inflammation after cataract surgery; Giant Papillary
Conjunctivitis; Corneal ulcer (e.g., Mooren's ulcer, corneal ulcer subsequent to
chronic rheumatoid arthritis or collagen disease, Terrien's margine
degeneration, catarrhal corneal ulcer, infectious corneal ulcer); Corneal
Trauma; Corneal Graft Rejection; Contact lens-induced Keratoconjunctivitis;
Conjunctivitis; Chronic anterior uveitis; Atopic keratoconjunctivitis; Allograft
Rejection; Allergic Conjunctivitis; Alkaline erosive keratoconjunctivitis;
Allergic keratitis; Behcet's syndrome; Diabetic keratophathy; Episcleritis;
Iritis; Keratoconus; Keratoconjunctival inflammatory disease; Necrotic
keratitis; Neuroparalytic keratitis; Scleritis; Ocular rosacea; Ocular herpes;
Rubeosis iritis; Sympathetic ophthalmia; Stevens-Johnson syndrome (erythema
multiforme major); Phacoanaphylaxis; Corneal neovascularization (inflammatory,
transplantation, developmental hypoplasia of the iris); Vitamin A
insufficiency-induced keratomalacia; Papillitis; Ophthalmic pemphigoid;
Map-dot-fingerprint dystrophy; Lattice dystrophy; Iridocorneal endothelial
syndrome; Herpes zoster (shingles); Blepharitis; and, to the extent approved by
the Joint Steering Committee pursuant to this Agreement, Pan Uveitis, and all
other similar diseases as agreed to by the Joint Steering Committee.

          1.39     "FOVEA BACKGROUND TECHNOLOGY" means (a) Fovea's proprietary IN
VITRO and IN VIVO models of ophthalmic diseases as of the Effective Date or
during the Evaluation Period; (b) Improvements made by Fovea to the foregoing;
and (c) Intellectual Property pertaining to any of the foregoing.

          1.40     "FOVEA COLLABORATION COMBINATION IP" means Collaboration
Combination IP that is conceived by Fovea or Third Parties acting on behalf of
Fovea.

          1.41     "FOVEA GENERATED DATA" means data generated by Fovea relating
to a Combination.

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          1.42     "FOVEA LICENSED COMBINATION IP" means any Intellectual
Property conceived by Fovea and relating to a Licensed Combination or the
Manufacture or use thereof.

          1.43     "FOVEA TERRITORY" means all countries in the world, but
excluding countries in the CombinatoRx Territory and the Shared Territory.

          1.44     "HEADS" means the Chief Executive Officer of CombinatoRx and
the Chief Executive Officer of Fovea.

          1.45     "IMPROVEMENTS" means patentable or material non-patentable
improvements, variations, updates, adaptations, modifications or upgrades or
enhancements.

          1.46     "IND" means an application submitted to a Regulatory Authority
to initiate human clinical studies, including (a) an Investigational New Drug
application or any successor application or procedure filed with the FDA, (b)
any foreign equivalent of a U.S. Investigational New Drug application, and (c)
all supplements and amendments that may be filed with respect to the foregoing.

          1.47     "INDEMNIFICATION CLAIM NOTICE" has the meaning set forth in
Section 10.3.

          1.48     "INDEMNIFIED PARTY" means a Party seeking to recover a Loss
under Section 10.1 or 10.2.

          1.49     "INDEMNIFYING PARTY" means a Party from whom recovery of a
Loss is sought under Section 10.1 or 10.2.

          1.50     "INDEMNITEE" has the meaning set forth in Section 10.3.

          1.51     "INDIRECT TAXES" means value added taxes, sales taxes,
consumption taxes and other similar taxes.

          1.52     "INFORMATION" means all technical, scientific and other
know-how and information, trade secrets, knowledge, technology, means, methods,
processes, principles, practices, formulae, instructions, documentation, skills,
techniques, procedures, experiences, ideas, inventions, discoveries, technical
assistance, designs, drawings, reports, procedures, computer programs,
apparatuses, specifications, data, results and other information and material,
including without limitation: the process and results of high-throughput
screening and any other drug discovery and development technology; biological,
chemical, pharmacological, toxicological, pharmaceutical, physical and
analytical, pre-clinical, clinical, safety, manufacturing and quality control
data and information, including study designs and protocols; assays and
biological methodology; Manufacturing and quality control procedures and data,
including test procedures; and synthesis, purification and isolation techniques,
(whether or not confidential, proprietary, patented or patentable) in written,
electronic or any other form now known or hereafter developed.

          1.53     "INTELLECTUAL PROPERTY" means any and all ideas, inventions,
discoveries, know-how, data, databases, documentation, reports, materials,
writings, designs, computer software, processes, principles, methods, techniques
and other information, including, without limitation, Patents, trademarks,
service marks, trade names, registered designs, design rights, copyrights
(including rights in computer software and database rights) and any

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rights similar to any of the foregoing in any part of the world, whether
registered or not, together with the right to apply for the registration of any
such property.

          1.54     "KNOWLEDGE" means a Party's and its Affiliates' understanding
in good faith of the relevant facts and information resulting from the
reasonable conduct of its business affairs, but without the requirement of
performing an investigation with respect to any such facts and information.

          1.55     "LICENSED COMBINATION" means any drug combination in the
Chalice Database that consists of an SSA.

          1.56     "LICENSED COMBINATION FIELD" means use of Licensed
Combinations for treating FOE Diseases by Local Administration.

           1.57     "LICENSED INFORMATION" means Information which is Controlled
by CombinatoRx as of the Effective Date or thereafter through the Term of this
Agreement and which is necessary for the evaluation of Collaboration
Combinations or Licensed Combinations or Exploitation of the Collaboration
Combinations or Licensed Combinations or Selected Collaboration Products and/or
Selected Licensed Products, but excluding any Information to the extent covered
by a Valid Claim within the Licensed Patents.

           1.58     "LICENSED PATENTS" means all Patents anywhere in the world
covering or directed to the composition, Manufacture, or use of Collaboration
Combinations or Licensed Combinations, (alone or in combination with other
compounds or substances and/or in combination with therapeutic devices),
Selected Collaboration Products, and/or Selected Licensed Products, having any
application within the Collaboration Combination Field or Licensed Combination
Field, in all such cases Controlled by CombinatoRx and/or its Affiliates as of
or after the Effective Date and through the Term of this Agreement.

          1.59     "LICENSED SELECTED COLLABORATION PRODUCTS" means all Selected
Collaboration Products containing a particular Selected Collaboration
Combination with respect to which a Target Dossier has been delivered to
CombinatoRx under this Agreement and for which Regulatory Approval may be
obtained without the need to conduct additional Phase I and/or Phase II clinical
studies for such Selected Collaboration Product in addition to those described
in such Target Dossier. By way of example, a Selected Collaboration Product for
which a Target Dossier is delivered to CombinatoRx and for which Regulatory
Approval is obtained for a particular indication shall be considered a single
Licensed Selected Collaboration Product together with all other indications for
which Regulatory Approval may be obtained for such Selected Collaboration
Product based on post-marketing Phase IV studies, however if additional Phase I
or Phase II clinical studies are required to obtain Regulatory Approval, then
such Selected Collaboration Product shall be considered a separate Licensed
Selected Collaboration Product requiring the delivery of a new Target Dossier to
obtain a license to Exploit such Selected Collaboration Product for the
indication obtained with such Regulatory Approval.

          1.60     "LICENSED SELECTION PERIOD" shall have the meaning set forth
in Section 4.2.

          1.61     "LOCAL ADMINISTRATION" means local ophthalmic delivery to the
surface or interior of the eye.

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          1.62     "LOSSES" means any and all direct liability, damage, loss or
expense, including interest, penalties and reasonable lawyers' fees and
disbursements. In calculating Losses, the duty to mitigate on the part of the
Party suffering the Loss shall be taken into account.

          1.63     "MANUFACTURE" and "MANUFACTURING" means, with respect to a
product or compound, the synthesis, manufacturing, processing, formulating,
compounding, filling, finishing, packaging, labeling, holding and quality
control testing of such product or compound.

          1.64     "NET SALES" means the gross invoiced amount on sales of the
Selected Licensed Combinations or Selected Licensed Products by Fovea, its
Sublicensees and its Affiliates to Third Parties (including Distributors, but
excluding Sublicensees) less the total of following deductions to the extent
actually incurred:

                  (a)      normal and customary trade, quantity and prompt
                          settlement discounts (including chargebacks and
                          allowances) actually allowed and not otherwise
                          deducted from the amount invoiced;

                  (b)      amounts repaid or credited by reason of rejection,
                          returns or recalls of goods, rebates, bona fide price
                          reductions and amounts written off by reason of
                          uncollectible debt, in all cases as determined by
                          Fovea or its Affiliates in good faith;

                  (c)      rebates and similar payments made with respect to
                          sales paid for by any governmental or Regulatory
                          Authority such as, by way of illustration and not in
                           limitation of the Parties' rights hereunder, federal
                          or state Medicaid, Medicare or similar state program
                          in the United States or equivalent governmental
                          program in any other country;

                  (d)      excise taxes, Indirect Taxes, customs duties, customs
                          levies and import fees imposed on the sale,
                          importation, use and/or distribution of the Licensed
                           Combinations or Selected Licensed Products actually
                          invoiced;

                  (e)      reasonable and customary transportation costs,
                          distribution expenses, special packaging and related
                          insurance charges actually invoiced, excluding
                          commissions and fees paid to Third Party distributors;
                          and

                  (f)      any other similar deductions that are actually
                          credited to the customer and are consistent with
                          generally accepted accounting principles, or in the
                          case of non-United States sales, other applicable
                           accounting standards.

              In the case of any other sale or other disposal for value, such as
              barter or counter-trade, of any Licensed Combinations or Selected
              Licensed Products, or part thereof, Net Sales shall be calculated
              as above on the fair market value of the consideration given. In
              the case of any sale which is not invoiced or is delivered before
              invoice, Net Sales shall be calculated as of time of shipment. Net
               Sales shall be calculated using Fovea's internal systems used to
              report such sales, which

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              reporting is done in accordance with GAAP consistently applied, as
              adjusted for any of items (a) to (f) above not taken into account
              in such systems.

          1.65     "NORTH AMERICA" means the United States, its possessions and
territories, Canada and Mexico.

          1.66     "OPHTHALMIC COMBINATION" means drug combination that consists
of two drugs, each of which is approved by a Regulatory Authority for any
indication of the eye.

          1.67     "PATENT COVERAGE" means, for a particular Selected Licensed
Product in a given country, there exists a Valid Claim within the CombinatoRx
Licensed Combination IP or Fovea Licensed Combination IP, in such country
(assuming, with respect to patent applications, that the Valid Claims included
in such application are issued as set forth in such patent applications) that,
but for the license granted to Fovea under this Agreement, would have been
infringed by the Manufacture, use or sale of such Selected Licensed Product in
such country.

          1.68     "PATENTS" means (a) all national, regional and international
patents and patent applications, including provisional patent applications, (b)
all patent applications filed either from such patents, patent applications or
provisional applications or from an application claiming priority from either of
these, including divisionals, continuations, continuations-in-part,
provisionals, converted provisionals, and continued prosecution applications,
(c) any and all patents that have issued or in the future issue from the
foregoing patent applications ((a) and (b)), including utility models, petty
patents and design patents and certificates of invention, (d) any and all
extensions or restorations by existing or future extension or restoration
mechanisms, including revalidations, reissues, re-examinations and extensions
(including any supplementary protection certificates and the like) of the
foregoing patents or patent applications ((a), (b) and (c)), and (e) any similar
rights, including so-called pipeline protection, or any importation,
revalidation, confirmation or introduction patent or registration patent or
patent of additions to any such foregoing patent applications and patents.

          1.69     "PAYMENTS" has the meaning set forth in Section 5.13.1.

          1.70     "PERMITTED DELAY" means any one of the following: (i) delay
relating to development resulting from safety or efficacy concerns or caused by
a need to pursue development for a new indication, if such delays have been
approved by the Joint Steering Committee; (ii) delay resulting from the need to
obtain Third Party patent rights for development and/or commercialization; (iii)
delay that is imposed by a Regulatory Authority or (iv) any other unexpected
event approved by the Joint Steering Committee.

          1.71     "PERSON" means an individual, sole proprietorship,
partnership, limited partnership, limited liability partnership, corporation,
limited liability company, business trust, joint stock company, trust,
unincorporated association, joint venture or other similar entity or
organization, including a government or political subdivision, department or
agency of a government.

          1.72     "PHASE I STUDY" shall mean a study of a Selected Combination
Product or Selected Licensed Product in human volunteers or patients the purpose
of which is preliminary determination of safety and tolerability of one or more
dosing regimens and for

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which there are no primary endpoints (as recognized by FDA or other Regulatory
Authorities) in the protocol relating to efficacy.

          1.73     "PHASE II(a) STUDY" shall mean a statistically significant
preliminary efficacy and safety study of a Selected Combination Product or
Selected Licensed Product in the target patient population designed to
demonstrate clinical proof-of-concept.

          1.74     "PHASE II(b) STUDY" shall mean a statistically significant
study of a Selected Combination Product or Selected Licensed Product to evaluate
further any preliminary efficacy observed for, and the safety of, the Selected
Combination Product or Selected Licensed Product in the target patient
population and/or to provide data that may be useful in the design of subsequent
studies of the Selected Combination Product or Selected Licensed Product such as
Phase III Studies or Pivotal Trials, including, but not limited to dose level,
dose ratio, and dose regimen.

          1.75     "PHASE III STUDY" shall mean a controlled study to confirm
with statistical significance the efficacy and safety of a Selected Combination
Product or Selected Licensed Product performed to obtain marketing and/or
manufacturing approval for the product in any country.

          1.76     "PIVOTAL TRIAL" means a clinical study conducted among the
intended patient population, of a size and rigor sufficient to support the
filing of an application for Regulatory Approval of a Selected Collaboration
Product or Selected Licensed Product.

          1.77     "RECEIVING PARTY" has the meaning set forth in Section 8.1.1.

          1.78     "REGULATORY APPROVAL" means, with respect to a country in a
territory, any and all approvals, licenses, registrations or authorizations of
any Regulatory Authority necessary to commercially Manufacture, distribute, sell
or market a Selected Collaboration Product or Selected Licensed Product in such
country, including, where reasonably required to engage in such activities, (a)
pricing or reimbursement approval in such country, (b) pre- approval marketing
authorizations (including any prerequisite Manufacturing approval or
authorization related thereto), and (c) labeling approval.

          1.79     "REGULATORY AUTHORITY" means any applicable supra-national,
federal, national, regional, state, provincial or local regulatory agency,
department, bureau, commission, council or other government entity regulating or
otherwise exercising authority with respect to the Exploitation of the
Combinations, Selected Licensed Products and/or Selected Collaboration Products
in a country or territory. The term "Regulatory Authority" includes, but is not
limited to, the FDA, the European Agency for the Evaluation of Medicinal
Products, European Member State Competent Authorities and the Ministry of
Health, Labour and Welfare.

          1.80     "REGULATORY DOCUMENTATION" means all applications,
registrations, licenses, authorizations and approvals (including all Regulatory
Approvals), all correspondence submitted to or received from Regulatory
Authorities (including minutes and official contact reports relating to any
communications with any Regulatory Authority) and all supporting documents and
all clinical studies and tests, relating to any licensed combination or licensed
products, and all data contained in any of the foregoing, including all
applications related to

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obtaining Regulatory Approval, Regulatory Approvals, regulatory drug lists,
advertising and promotion documents, adverse event files and complaint files.

          1.81     "SELECTED COLLABORATION COMBINATION" means a Collaboration
Combination which Fovea has selected for development pursuant to Section 3.3.2.

          1.82     "SELECTED COLLABORATION PRODUCT" means a pharmaceutical
preparation suitable for administration to a human, containing a Selected
Collaboration Combination as an Active Ingredient.

          1.83     "SELECTED LICENSED COMBINATION" means a Licensed Combination
which Fovea has selected for development pursuant to Section 4.2.

          1.84     "SELECTED COLLABORATION COMBINATION QUARTERLY REPORT" shall
have the mean set forth in Section 3.4.1.

          1.85     "SELECTED LICENSED PRODUCT" means a pharmaceutical preparation
suitable for administration to a human, containing a Selected Licensed
Combination as an Active Ingredient.

          1.86     "SHARED TERRITORY" means Japan and Taiwan. The Parties shall
have equal rights in the Shared Territory in accordance with the terms of this
Agreement.

          1.87     "SSA" a Selective Steroid Amplifier as a therapeutic drug
containing two or more active pharmaceutical ingredients where one of the agents
is a corticosteroid.

          1.88     "SUBLICENSEE" has the meaning set forth in Section 2.3.1.

          1.89     "SUBSEQUENT COMBINATORX COLLABORATION COMBINATION IP" means
any Intellectual Property (i) Controlled by CombinatoRx, (ii) relating to or
covering a Collaboration Combination, which may be necessary or useful in
developing, using, selling or registering a Selected Collaboration Product, and
(iii) conceived after the termination of the Evaluation Period.

          1.90     "SUBSEQUENT FOVEA COLLABORATION COMBINATION IP" means any
Intellectual Property (i) Controlled by Fovea, (ii) relating to or covering a
Collaboration Combination, and which may be necessary or useful in developing,
using, selling or registering a Selected Collaboration Product, and (iii)
conceived after the termination of the Evaluation Period.

          1.91     "TARGET DOSSIER" shall mean all data, information and
materials generated from the conduct of all formulation studies, including
commercial formulation, pre-clinical studies and clinical development studies,
including, to the extent necessary, toxicology, Phase I, Phase II, and
pharmacokinetic studies necessary to initiate a Phase III study for a drug
combination in the United States and in Europe. The Target Dossier will meet the
guidelines set forth below. The Target Dossier and the development plan required
to produce the Target Dossier will be finalized based on the outcome of a
pre-IND meeting with the FDA.

A GUIDELINE FOR A TARGET DOSSIER WITH A STANDARD (NON PIVOTAL) PHASE IIB
CLINICAL STUDY FOLLOWS:

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     -     Safety and pharmacokinetic data in patients sufficient to support
          initiation of a Phase III study in the United States
     -     Clinical data in patients demonstrating statistical superiority of
          combination versus parts
      -     Clinical and/or preclinical safety and efficacy data sufficient to
          select dose and ratio for a Phase III study
     -     Final commercial formulation for initiation of a Phase III study (no
          additional work needed prior to first-patient-first-dose)
               -     Fixed ratio co-formulation
               -     Sufficient quantities of commercial formulation to complete
                    a Phase III study
               -     Data from any bridging studies (e.g., safety, PK,
                     bioequivalence) necessary for initiation of Phase III study
               -     All other chemistry, manufacturing and control (CMC)
                    information required to support Phase III studies and NDA
                    filing
     -     IND-ready pre-clinical efficacy and toxicology data
     -     Additional non clinical chronic toxicity data required for initiation
          of Phase III study , if necessary
     -     Regulatory documents from FDA and/or EMEA
               -      Minutes from pre-IND meeting approving experimental study
                    designs and clinical development plan through Phase IIb
               -     Minutes from post-Phase IIb meeting
               -     Annual reports to FDA and/or EMEA and other regulatory
                    authorities

A GUIDELINE FOR A TARGET DOSSIER WITH A PIVOTAL PHASE IIB CLINICAL STUDY
FOLLOWS:

     -     Safety and pharmacokinetic data in patients sufficient to support
          initiation of a Phase III study in the United States
     -     Data demonstrating clinical benefit in the target patient population
          (i.e., data from a pivotal, randomized, controlled, multi-center
          study)
     -     Clinical data in patients demonstrating statistical superiority of
          combination versus parts
     -     Clinical and/or preclinical safety and efficacy data sufficient to
          select dose and ratio for a Phase III study
     -     Final commercial formulation for initiation of a Phase III study (no
           additional work needed prior to first-patient-first-dose)
               -     Fixed ratio co-formulation
               -     Sufficient quantities of commercial formulation to complete
                    a Phase III study
               -     Data from any bridging studies (e.g., safety, PK,
                    bioequivalence) necessary for initiation of Phase III study
               -     All other chemistry, manufacturing and control (CMC)
                    information required to support Phase III studies and NDA
                    filing
     -     IND-ready pre-clinical efficacy and toxicology data
     -     Additional non clinical chronic toxicity data required for initiation
          of Phase III study , if necessary
     -     Regulatory documents from FDA and/or EMEA
               -     Minutes from pre-IND meeting approving experimental study
                    designs and clinical development plan through Phase IIb
               -     Minutes from post-Phase IIb meeting
               -     Annual reports to FDA and/orEMEA and other regulatory
                    authorities

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          1.92     "TARGET DOSSIER DEADLINE" has the meaning set forth in Section
3.9.2.

          1.93     "TERM" has the meaning set forth in Section 11.1.

          1.94     "THIRD PARTY" means any Person not including the Parties or
the Parties' respective Affiliates.

          1.95     "THIRD PARTY AGREEMENT" means all license, research and/or
other agreements entered into by CombinatoRx prior to or following the Effective
Date.

          1.96     "THIRD PARTY CLAIM" has the meaning set forth in Section 10.1.

          1.97     "TRADEMARK" means any word, name, symbol, color, designation
or device or any combination thereof, including any trademark, trade dress,
brand mark, trade name, brand name, logo or business symbol used by the Parties
in connection with the licensed Collaboration Combinations, Selected Combination
Products, Licensed Combinations or Selected Licensed Products.

          1.98     "TREATMENT" or "TREAT" means diagnosis, palliation,
monitoring, cure, mitigation, treatment or prevention.

          1.99     "UNITED STATES" or "U.S." means the United States of America,
including its territories, possessions and Puerto Rico.

          1.100    "VALID CLAIM" means a claim in a pending patent application or
an issued and unexpired patent that (a) has not been finally cancelled,
withdrawn, abandoned or rejected by any administrative agency or other body of
competent jurisdiction not subject to further appeal, (b) has not been revoked,
held invalid, or declared unpatentable or unenforceable in a decision of a court
or other body of competent jurisdiction that is unappealable or unappealed
within the time allowed for appeal, (c) has not been rendered unenforceable
through disclaimer, abandonment, withdrawal or otherwise, and (d) with respect
to a claim in a pending patent application, such claim is being actively
prosecuted in good faith and is believed in good faith to meet the requirements
of patentability in the relevant jurisdiction.

                                     ARTICLE 2
                                 GRANT OF RIGHTS

          2.1      COLLABORATION COMBINATIONS.

                  2.1.1    LICENSE GRANTS TO FOVEA.

                          (a)      SELECTED COLLABORATION COMBINATION RESEARCH
LICENSE. Subject to the terms and conditions of this Agreement, CombinatoRx
hereby grants to Fovea a royalty-free, co-exclusive (with CombinatoRx for its
internal activities), worldwide right and license, without the right to
sublicense, under the CombinatoRx Collaboration Combination IP and CombinatoRx's
interest in the Fovea Collaboration Combination IP to use Selected Collaboration
Combinations in the Collaboration Combination Field solely for the purpose of
conducting research, preclinical studies and clinical Phase I and Phase II
studies of such Collaboration Combinations.

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                          (b)      SELECTED COLLABORATION COMBINATION
EXPLOITATION LICENSE. Subject to the terms and conditions of this Agreement and
delivery of each Target Dossier in accordance with Section 3.9.2, CombinatoRx
hereby grants to Fovea a royalty-free, exclusive (which shall be co-exclusive
with CombinatoRx for the purpose of conducting clinical studies but not for
otherwise Exploiting Selected Collaboration Combinations under this Section)
right and license, with the right to grant sublicenses, under the CombinatoRx
Collaboration Combination IP, CombinatoRx's interest in the Fovea Collaboration
Combination IP, with respect to jointly owned Fovea Collaboration Combination IP
pursuant to Section 6.1.1, and Subsequent CombinatoRx Collaboration Combination
IP (i) to conduct Phase III Studies of the Selected Collaboration Combination
described in the Target Dossier in the Collaboration Combination Field anywhere
in the world and (ii) to Exploit such Selected Collaboration Combination and all
Licensed Selected Collaboration Products in the Collaboration Combination Field
in the Fovea Territory.

                          (c)      RIGHT OF REFERENCE TO DATA DURING EVALUATION
PERIOD. Subject to the terms and conditions of this Agreement, CombinatoRx
hereby grants to Fovea an exclusive, royalty free right of reference to all data
Controlled by CombinatoRx and existing on the Effective Date for any
Collaboration Combination for which CombinatoRx has commenced clinical studies
and CombinatoRx Generated Data generated during the Evaluation Period for Fovea
to conduct Phase I and Phase II clinical studies for Selected Collaboration
Combinations in the Collaboration Combination Field anywhere in the world during
the Evaluation Period. For the avoidance of doubt, CombinatoRx shall not be
restricted from granting additional rights of reference to the data described in
this Section to Third Parties for uses other than those specifically described
in this Section.

                          (d)      RIGHT OF REFERENCE TO DATA AFTER EVALUATION
PERIOD. Subject to the terms and conditions of this Agreement and delivery of a
Target Dossier in accordance with Section 3.9.2, CombinatoRx hereby grants to
Fovea an exclusive, royalty free right of reference to (i) Fovea Generated Data
generated during the Evaluation Period, (ii) CombinatoRx Generated Data
generated during the Evaluation Period, and (iii) clinical data Controlled by
CombinatoRx and existing on the Effective Date for any Collaboration Combination
for which CombinatoRx commenced clinical studies prior to the Effective Date, in
each case for Fovea to Exploit Licensed Selected Collaboration Products in the
Collaboration Combination Field in the Fovea Territory. For the avoidance of
doubt, CombinatoRx shall not be restricted from granting additional rights of
reference to the data described in this Section to Third Parties for uses other
than those specifically described in this Section.

                  2.1.2    LICENSE GRANT TO COMBINATORX. Subject to the terms and
conditions of this Agreement and in addition to the grants of rights in Sections
3.8.1(a) and 3.8.1(b), Fovea hereby grants to CombinatoRx:

                      (a)      a royalty-free, exclusive (which shall be
                               co-exclusive with Fovea) right and license, with
                              the right to grant sublicenses, under Fovea's
                              interest in all Fovea Collaboration Combination IP
                              that is jointly owned by the Parties to conduct
                              clinical studies for Selected Collaboration
                              Products in the Collaboration Combination Field
                              anywhere in the world and a royalty-free,
                              exclusive (which shall be exclusive even as to
                              Fovea) right and license, with the right to grant
                              sublicenses, under Fovea's interest in all Fovea
                               Collaboration

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                               Combination IP that is jointly owned by the
                              Parties pursuant to Section 6.1.1 to otherwise
                              Exploit Selected Collaboration Products in the
                              Collaboration Combination Field in the CombinatoRx
                              Territory;

                      (b)      a royalty-free, non-exclusive right and license,
                              with the right to grant sublicenses, under Fovea's
                               interest in all Fovea Collaboration Combination IP
                              that is solely owned by Fovea pursuant to Section
                              6.1.1 to Exploit Collaboration Combinations,
                              Selected Collaboration Products and other products
                              other than Selected Collaboration Products for any
                              purpose anywhere in the world;

                      (c)      a royalty-free, exclusive right and license, with
                              the right to grant sublicenses, under Fovea's
                              interest in all Fovea Collaboration Combination IP
                              that is jointly owned by the Parties pursuant to
                               Section 6.1.1 to Exploit products other than
                              Selected Collaboration Products for any purpose
                              anywhere in the world; and

                      (d)      a royalty-free, exclusive (which shall be
                              co-exclusive with Fovea for the purpose of
                              conducting clinical studies but not for otherwise
                              Exploiting Selected Collaboration Combinations
                               under this Section) right and license, with the
                              right to grant sublicenses, under Subsequent Fovea
                              Collaboration Combination IP to conduct Phase III
                               Studies (or their equivalent) of such Selected
                              Collaboration Combinations in the Collaboration
                              Combination Field anywhere in the world and to
                              Exploit Selected Collaboration Combinations and
                              Selected Collaboration Products in the
                              Collaboration Combination Field in the CombinatoRx
                              Territory.

                  2.1.3    RIGHT OF REFERENCE TO DATA AFTER EVALUATION PERIOD.
Subject to the terms and conditions of this Agreement, Fovea hereby grants to
CombinatoRx an exclusive, royalty free right of reference to Fovea Generated
Data for CombinatoRx to Exploit Collaboration Combinations in the Collaboration
Combination Field in the CombinatoRx Territory. For the avoidance of doubt,
Fovea shall not be restricted from granting additional rights of reference to
the data described in this Section to Third Parties for uses other than those
specifically described in this Section.

                  2.1.4    CO-EXCLUSIVE LICENSES.

                          (a)      Subject to the terms and conditions of this
Agreement and delivery of a Target Dossier in accordance with Section 3.9.2,
CombinatoRx hereby grants to Fovea a royalty-free, co-exclusive right and
license, with the right to grant sublicenses as set forth below in Section
2.1.3(c), under Collaboration Combination IP and Subsequent CombinatoRx
Collaboration Combination IP to Exploit Selected Collaboration Combinations and
Selected Collaboration Products in the Collaboration Combination Field in the
Shared Territory.

                          (b)      Subject to the terms and conditions of this
Agreement, Fovea hereby grants to CombinatoRx a royalty-free, co-exclusive right
and license, with the right to grant sublicenses as set forth below in Section
2.1.3(c), under Subsequent Fovea

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Collaboration Combination IP to Exploit Selected Collaboration Combinations and
Selected Collaboration Products in the Collaboration Combination Field in the
Shared Territory.

                          (c)      Neither Party may grant sublicenses of rights
obtained under Section 2.1.3 unless both Parties agree to grant sublicenses of
their rights under Section 2.1.3 to any particular sublicensee.

           2.2      LICENSED COMBINATIONS

                  2.2.1    LICENSE GRANTS TO FOVEA

                          (a)      LICENSED COMBINATION RESEARCH LICENSE. Subject
to the terms and conditions of this Agreement, CombinatoRx hereby grants to
Fovea a royalty-free, exclusive (even as to CombinatoRx), worldwide right and
license, with the right to grant sublicenses, under the CombinatoRx Licensed
Combination IP with respect to all Licensed Combinations prior to the expiration
of the Licensed Selection Period and only with respect to Selected Licensed
Combinations following the expiration of the Licensed Selection Period, to use
Licensed Combinations in the Licensed Combination Field solely for research and
development of such Licensed Combinations.

                           (b)      SELECTED LICENSED COMBINATION LICENSE. Subject
to the terms and conditions of this Agreement, CombinatoRx hereby grants to
Fovea a royalty-bearing, exclusive (even as to CombinatoRx) worldwide right and
license, with the right to grant sublicenses, under the CombinatoRx Licensed
Combination IP and CombinatoRx's interest in the Fovea Licensed Combination IP
to use Licensed Combinations in the Licensed Combination Field to Exploit
Selected Licensed Products.

                           (c)      RIGHT OF REFERENCE TO DATA. Subject to the
terms and conditions of this Agreement, CombinatoRx shall grant to Fovea a right
of reference to CombinatoRx Generated Data for Fovea to Exploit Selected
Licensed Products in the Licensed Combination Field.

                  2.2.2    LICENSE GRANTS TO COMBINATORX

                          (a)      Fovea hereby grants a royalty-free, exclusive
(even as to Fovea), worldwide right and license to CombinatoRx, with the right
to grant sublicenses, under Fovea's interest in the Fovea Licensed Combination
IP, to Exploit products outside the Licensed Combination Field.

                          (b)      RIGHT OF REFERENCE TO DATA. Fovea hereby
grants to CombinatoRx a right of reference to the Fovea Generated Data relating
to Licensed Combinations, for CombinatoRx to Exploit products outside the
Licensed Combination Field.

          2.3      SUBLICENSES.

                  2.3.1    BY FOVEA. Fovea has the right to grant sublicenses,
through multiple tiers of sublicensees, to the extent permitted under the
licenses granted in Section 2.1.1 and Section 2.2.1, to its Affiliates and to
any other Persons to the extent of the license to which any such sublicense
relates. An agreement by Fovea not to assert any rights granted to it under
Section 2.1 or Section 2.2 shall be considered a sublicense of such right for
the purposes of this Agreement. Where Fovea grants a sublicense to a Person that
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Affiliate of Fovea, and such Person is not a Distributor, such Person shall be a
"SUBLICENSEE" for purposes of this Agreement. Fovea shall ensure that all
Persons to which it grants sublicenses will comply with all terms and conditions
of this Agreement and be bound by indemnification obligations to CombinatoRx of
a scope not less than the indemnification obligations of Fovea contained herein,
and Fovea shall remain liable for any breach of this Agreement by a Sublicensee.
Fovea shall provide notice of the granting of any sublicense hereunder promptly
following the making of such grant. Such notice shall identify the Sublicensee
and the territory of the sublicense.

                  2.3.2    BY COMBINATORX. CombinatoRx has the right to grant
sublicenses, through multiple tiers of sublicensees to the extent permitted
under the licenses granted in Section 2.1.2 and Section 2.2.2, to its Affiliates
and to any other Persons to the extent of the license to which any such
sublicense relates. An agreement by CombinatoRx not to assert any rights granted
to it under Section 2.1 or Section 2.2 shall be considered a sublicense of such
right for the purposes of this Agreement. CombinatoRx shall ensure that all
Persons to which it grants sublicenses will comply with all terms and conditions
of this Agreement and be bound by indemnification obligations to Fovea of a
scope not less than the indemnification obligations of CombinatoRx contained
herein, and CombinatoRx shall remain liable for any breach of this Agreement by
a sublicensee. CombinatoRx shall provide notice of the granting of any
sublicense hereunder promptly following the making of such grant. Such notice
shall identify the sublicensee and the territory of the sublicense.

                  2.3.3    BY COMBINATORX AND FOVEA. The Parties shall have the
joint right to grant sublicenses, through multiple tiers of sublicensees, under
the licenses granted in Section 2.1.3, to its Affiliates and to any other
Persons in the Shared Territory

          2.4      DISTRIBUTORSHIPS. The Parties have the right, in their sole
discretion, to appoint their Affiliates, who shall have the right, in their
sole, respective discretion, to appoint any other Persons, in its territory or
in any country of its territory, to distribute, market and sell those products
for which Exploitation rights have been granted hereunder. Where a Party or its
Affiliates appoints such a Person that is not an Affiliate of such Party, that
Person shall be a "DISTRIBUTOR" for purposes of this Agreement.

                                    ARTICLE 3
                           COLLABORATION COMBINATIONS

          3.1      DETAILED DEVELOPMENT PLAN. Fovea shall develop each Selected
Collaboration Combination for each disease indication selected in accordance
with a Detailed Development Plan to be developed in accordance with the terms of
this Agreement. Within thirty (30) days of the selection of a Selected
Collaboration Combination, Fovea shall prepare a Detailed Development Plan for
such Selected Collaboration Combination. Within such 30-day period, the Detailed
Development Plan shall then be submitted to the Joint Steering Committee for
approval, as specified in Section 3.2.2. A Detailed Development Plan approved by
the Joint Steering Committee for a Selected Collaboration Combination shall be
the Detailed Development Plan for such Collaboration Combination.

          3.2       MANAGEMENT OF DEVELOPMENT OF COLLABORATION COMPOUNDS AND
SELECTED COLLABORATION PRODUCTS - JOINT STEERING COMMITTEE

                  3.2.1    FORMATION. Within thirty (30) days after the Effective
Date, the Parties shall form a Joint Steering Committee (the "JOINT STEERING
COMMITTEE"). The Joint Steering

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Committee shall consist of equal numbers appointed by each respective Party,
which shall include the CombinatoRx Senior Vice President of Commercial
Operations (or a similar CombinatoRx officer) and the Fovea Chief Operating
Officer (or a similar Fovea officer) acting as Co-Chairs. Each Party shall have
the right to replace its respective Joint Steering Committee representatives
upon written notice to the other Party. Each Party shall be entitled to bring
for an agenda item at a meeting of the Joint Steering Committee such minimum
numbers of nonvoting advisors, consultants and other visitors which such Party
considers in good faith necessary or useful to such Party to protect its
interest regarding the business to be dealt with under such agenda item. If such
visitors are not employees of a Party, their attendance at the Joint Steering
Committee meeting shall be further conditioned upon agreement with the inviting
Party over confidentiality and non-use obligations no less burdensome than those
set forth herein.

                  3.2.2    RESPONSIBILITIES OF THE JOINT STEERING COMMITTEE.

                      (a)      The Joint Steering Committee shall monitor the
                              activities of each Detailed Development Plan. In
                               particular, the responsibilities of the Joint
                              Steering Committee shall include: (a) determining
                              whether or not the criteria for continued
                              development under a particular Detailed
                              Development Plan have been met; (b) defining the
                              Target Dossier in accordance with Section 1.91;
                              (c) approving the Detailed Development Plan for
                              each Selected Collaboration Combination and
                              Selected Licensed Combination; (d) planning,
                              reviewing and approving preclinical and clinical
                               study designs; (e) planning, reviewing and
                              approving the timelines to complete such studies,
                              including any amendments to the timeline
                              necessitated by Permitted Delays; (f) ensuring
                              that clinical Phase I and Phase II studies, in
                              accordance with the Target Dossier, are designed
                              such that results from such studies can be used to
                              initiate Phase III Studies in the United States
                              and Europe; (g) approving formulation technologies
                              and license terms, as appropriate, for developing
                               commercial formulations to be used to conduct the
                              Phase III Studies for treating FOE Disease and/or
                              BOE Disease; (h) ensuring proper communication
                               between the Parties; and (i) recommending to the
                              CEOs of each Party adjustments to any deadlines
                              described in the Development Plans, in the event
                              such adjustments are needed.

                      (b)      The Joint Steering Committee shall also coordinate
                              preclinical and clinical studies of Selected
                              Collaboration Combinations that are being
                               developed in the Collaboration Combination Field
                              by both Parties and the publication of data from
                              these studies, which studies will be conducted in
                              a manner consistent with CombinatoRx's global
                              development activities of the Selected
                              Collaboration Combinations. All of Fovea's
                              preclinical and clinical plans, protocols,
                              investigators and regulatory submissions related
                              to the Selected Collaboration Combination shall
                              each be subject to prior approval by the Joint
                               Steering Committee. CombinatoRx shall disclose to
                              the Joint

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                              Steering Committee all CombinatoRx Generated Data
                              related to Selected Collaboration Combinations.
                              Adverse experiences shall be promptly communicated
                              by each Party to the other, along with all
                              supporting documentation in a manner consistent
                              with applicable regulatory authority reporting
                              requirements.

                  3.2.3    DISPUTES. The Joint Steering Committee shall endeavor
to reach consensus on all matters brought before it with each Party having a
single vote, irrespective of the number of representatives actually in
attendance at a meeting; provided, however, that in the event the Joint Steering
Committee is unable to resolve a material dispute before it within thirty (30)
days of the time that it first considers such matter, such matter shall be
resolved in accordance with Article 12.

                  3.2.4    MEETINGS. The Joint Steering Committee shall meet once
each Calendar Quarter following the Effective Date. Regular quarterly meetings
shall be scheduled on a recurring schedule to be established by the Joint
Steering Committee (e.g. the first Tuesday of January, April, July and October
at the place of meeting, if held in person), or at such other times mutually
agreed to no less than three (3) months in advance, except for the initial
meeting of the Joint Steering Committee, which shall be at a mutually agreeable
time and place and shall take place no later than thirty (30) days after the
Effective Date. In person meetings of the Joint Steering Committee will be held
at alternating locations of the respective Co-Chair's choosing, or by
teleconference or videoconference at the respective Co-Chair's discretion.
Subject to Section 3.2.1, a quorum of the Joint Steering Committee exists
whenever there is present at a meeting each of the Co-Chairs or their respective
designees. In addition, the Joint Steering Committee may act without a formal
meeting by a written memorandum signed by the Co-Chairs of the Joint Steering
Committee. Whenever any action by the Joint Steering Committee is required
hereunder during a time period in which the Joint Steering Committee is not
scheduled to meet, either Co-Chair shall have the right, in accordance with
Section 3.2.5, to call a special meeting or the Co-Chairs may cause the Joint
Steering Committee to take the action without a meeting in the applicable time
period. Any such additional meetings shall be held at places and on dates
selected by mutual agreement of the Co-Chairs.

                  3.2.5    SPECIAL MEETING. Notwithstanding Section 3.2.4, either
Co-Chair may call for a meeting to be held on a business day by notifying the
other Party no later than fifteen (15) days in advance of a meeting of the Joint
Steering Committee of the exact date, time and location for the meeting;
provided, that (a) if such notice has been timely issued and the meeting is held
on the date, time and place so indicated, or (b) if the other Party confirms
that it has been properly notified about the meeting, then a quorum shall be
considered constituted at that meeting unless all members of one Party fail to
attend the meeting because of illness, where no substitution could be reasonably
arranged, general breakdown in the instrumentalities of communication, travel
difficulties beyond the reasonable control of such Party, or any other
reasonable reason. For the purpose of agreeing that a Party has been properly
notified of the meeting in the case under (b), attendance to a meeting without
express objection thereto shall be sufficient.

                  3.2.6    EXPENSES. CombinatoRx and Fovea each shall bear all
expenses of its Joint Steering Committee members related to such members'
participation on the Joint Steering Committee and attendance at Joint Steering
Committee meetings

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                  3.2.7    MINUTES. The Joint Steering Committee shall keep
accurate minutes of its deliberations, which minutes shall record all proposed
decisions and all actions recommended or taken. Furthermore, all Collaboration
Combinations disclosed to Fovea shall be recorded in the minutes of the Joint
Steering Committee. Drafts of minutes shall be delivered to the Co-Chairs of the
Joint Steering Committee within twenty (20) days after the respective meeting.
The Parties, on an alternating basis, shall prepare and circulate the draft
minutes. Draft minutes shall be edited by the Co-Chairs and shall be issued in
final form only with the approval and agreement of the Co-Chairs. All
communications and minutes regarding the Joint Steering Committee shall be in
English.

          3.3      SELECTION PERIOD FOR COLLABORATION COMBINATIONS.

                   3.3.1    COMBINATION ASSESSMENT DATA. Promptly following the
Effective Date, CombinatoRx shall provide to Fovea all Combination Assessment
Data for each Collaboration Combination.

                  3.3.2    SELECTION PERIOD AND SELECTION. Fovea shall have
ninety (90) days after receiving all Combination Assessment Data from
CombinatoRx (the "Collaboration Selection Period") to select the Selected
Collaboration Combinations. Fovea shall select at least five (5) but not more
than ten (10) each of ECI Collaboration Combinations, CM Collaboration
Combinations and SSA Collaboration Combinations during the Collaboration
Selection Period; provided that, (x) for each Ophthalmic Combination that Fovea
selects, Fovea must select a Collaboration Combination that is not an Ophthalmic
Combination and shall so designate which non-Ophthalmic Combination is selected
with respect to each such Ophthalmic Combination (each such pair of
Collaboration Combinations, a "Collaboration Combination Pair"); (y) Fovea may
only select a Selected Collaboration Combination (i) that uses a different
proposed delivery method from a Selected Licensed Combination or (ii) for which
one of the components of the combination is different from the components of a
Selected Licensed Combination, in either case for the purpose of avoiding the
use of a SSA Combination approved for FOE Disease in an off-label manner for BOE
Disease. Fovea shall provide notice of the Selected Collaboration Combinations
selected during the Collaboration Selection Period by written notice specifying
the particular Collaboration Combinations being selected.

          3.4      EVALUATION PERIOD

                  3.4.1    EVALUATION PERIOD. For each Selected Collaboration
Combination, the Evaluation Period shall extend from the date of selection until
the delivery of the Target Dossier to CombinatoRx for such Selected
Collaboration Combination in accordance with Section 3.9.2. During the
Evaluation Period for a particular Selected Collaboration Combination, Fovea
shall provide to CombinatoRx a written report (the "Selected Collaboration
Combination Quarterly Report") summarizing development results and activities
from the preceding Calendar Quarter relating to such Selected Collaboration
Combination. The Selected Collaboration Combination Quarterly Report shall be
delivered to CombinatoRx within fifteen (15) days after the end of the preceding
Calendar Quarter.

                  3.4.2    NON DELIVERY OF TARGET DOSSIER. In the event that
Fovea does not deliver a Target Dossier to CombinatoRx for a particular Selected
Collaboration Combination prior to the Target Dossier Deadline (as defined in
Section 3.9.2) or is otherwise not meeting its obligations under Section 3.9
hereof, then:

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                  (a) Fovea shall return to CombinatoRx any samples of such
                       Collaboration Combination previously provided by
                      CombinatoRx that are still in Fovea's possession;

                  (b) Fovea shall return to CombinatoRx all Combination
                      Assessment Data, Regulatory Documentation and all Fovea
                      Generated Data associated with such Collaboration
                      Combination; and

                  (c) CombinatoRx shall have the right to pursue development of
                      such Collaboration Combination as follows:

                          a.       If Fovea has failed to deliver a Target
                                  Dossier by the latest applicable Target
                                  Dossier Deadline (or Fovea has otherwise
                                  notified CombinatoRx in writing that Fovea has
                                  ceased development) for at least one Selected
                                  Collaboration Combination within each type
                                   (i.e. CM, ECI, SSA) of Collaboration
                                  Combination (or has failed to select any
                                  Collaboration Combination within a particular
                                  type of Collaboration Combination), then
                                  CombinatoRx may Exploit a Collaboration
                                  Combination of such type of Collaboration
                                  Combination for any indication without
                                   restriction;

                          b.       For Collaboration Combinations that are not
                                  described in clause a. above, CombinatoRx may
                                  Exploit such Collaboration Combination for any
                                  indication provided that such Collaboration
                                  Combination is not being developed for an
                                  indication that directly competes with a
                                  Collaboration Combination being developed by
                                  Fovea at the time that CombinatoRx commences
                                  development of such Collaboration Combination
                                   outside of the Collaboration Combination
                                  Field.

                  3.4.3    EXTENSION OF EVALUATION PERIOD. The Evaluation Period
and the Target Dossier Deadline shall be extended by a period to be mutually
agreed by the Parties with respect to a particular Selected Collaboration
Combination if a new Phase II Study is necessary to commercialize such Selected
Collaboration Combination for an indication which differs from the indication
originally being evaluated.

          3.5      INDICATIONS. The initial disease indications for a Selected
Collaboration Combination shall be provided in the Detailed Development Plan.
Fovea shall seek the consent of the Joint Steering Committee to develop any
follow-on indications not provided in the Detailed Development Plan for a
Selected Collaboration Combination.

          3.6      PHASE III STUDIES.

                  3.6.1    GENERAL. Not later than ninety (90) days prior to the
anticipated expiration of the Evaluation Period for a Selected Collaboration
Combination, the Parties shall agree in writing whether (a) the Parties will
jointly pursue Phase III Trials, (b) the Parties will each separately pursue
Phase III Trials, or (c) only a Pursuing Party (as defined below) will pursue
the Phase III Trials; provided that, no Party that desired to pursue Phase III
Trials shall be precluded from doing so under this Section.

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                  3.6.2    PURSUIT OF PHASE III STUDIES.

                          (a)      JOINT PURSUIT. The Parties may decide that
they shall jointly pursue Regulatory Approval for a particular Selected
Collaboration Combination, in which event, the Joint Steering Committee shall
oversee such development activities and the Parties will negotiate in good faith
the terms of any such joint pursuit.

                           (b)      SEPARATE PURSUIT. If the Parties do not decide
to jointly pursue Regulatory Approval of a Selected Collaboration Combination,
each Party may separately pursue Regulatory Approval of such Selected
Collaboration Combination in its territory. Each Party shall be responsible for
conducting its own Phase III Trials, as well as any additional studies necessary
to obtain Regulatory Approval in its territory. Upon request by either Party,
the Parties shall negotiate in good faith whether the requesting Party may
reference the other Party's Regulatory Documentation.

                          (c)      SINGLE PARTY PURSUIT. If a Party (the
"Non-Pursuing Party") indicates to the other Party in writing its decision not
to pursue Regulatory Approval of a particular Selected Collaboration
Combination, the other Party (the "Pursuing Party") shall have a right of first
negotiation to obtain exclusive rights to Exploit such Selected Collaboration
Combination in the Non-Pursuing Party's territory. If the Pursuing Party desires
to obtain rights to Exploit such Selected Collaboration Combination in the
Non-Pursuing Party's territory, the Pursuing Party shall so notify the
Non-Pursuing Party and the Parties shall thereafter negotiate the terms of such
rights for a period of not less than 90 days. If the Parties are unable to reach
agreement on such terms within such 90-day period, then the Non-Pursuing Party
shall be permitted to grant its rights in its territory to a third party without
restriction.

          3.7      SHARED TERRITORY. The Parties shall have co-exclusive rights
in the Shared Territory to Exploit Selected Collaboration Combinations,
including development, commercialization and licensing. All decisions regarding
Exploitation of Selected Collaboration Combinations or Selected Collaboration
Products in the Shared Territory shall be made by mutual agreement of the
Parties; provided that, such decisions shall not be subject to Section 12.3 if
the Parties are unable to reach agreement regarding such Exploitation.

          3.8      FORMULATIONS OF COLLABORATION COMBINATIONS.

                  3.8.1    FORMULATION TECHNOLOGY. Fovea shall be responsible for
developing or obtaining from Third Parties at its election all technology
necessary to develop commercial formulations of the Selected Collaboration
Combinations (as so developed or obtained by Fovea, the "Formulation
Technology"). All Formulation Technology and Intellectual Property pertaining
thereto shall be owned by Fovea.

                           (a)      FOVEA DEVELOPED TECHNOLOGY. In the event that
Fovea has developed any Formulation Technology prior to the Effective Date or
develops any Formulation Technology at any time after the Effective Date, Fovea
shall, and does hereby, grant to CombinatoRx a royalty-free, fully paid up,
right and license, with the right to grant sublicenses, in the CombinatoRx
Territory and the Shared Territory to use such Formulation Technology solely for
the Exploitation of Selected Collaboration Products in the Collaboration
Combination Field.

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                           (b)      FOVEA IN-LICENSED TECHNOLOGY. In the event
that Fovea has in-licensed any Formulation Technology from a Third Party prior
to the Effective Date or in-licenses any Formulation Technology at any time
after the Effective Date, then (i) Fovea shall, and does hereby, grant to
CombinatoRx a sublicense, with the right to grant further sublicenses, in the
CombinatoRx Territory and the Shared Territory to use such Formulation
Technology solely for the Exploitation of Selected Collaboration Products in the
Collaboration Combination Field, (ii) CombinatoRx shall pay royalties that may
be owed to the Third Party licensing such Formulation Technology to Fovea on
sales of Selected Collaboration Products utilizing such Formulation Technology
in the CombinatoRx Territory, and (iii) the Parties shall each pay 50% of the
royalties that may be owed to the Third Party licensing such Formulation
Technology to Fovea on sales of Selected Collaboration Products utilizing such
Formulation Technology in the Shared Territory.

                  3.8.2    COSTS. Fovea shall be responsible for any and all
costs necessary for developing, acquiring or licensing the Formulation
Technology.

                  3.8.3    FORMULATIONS SOLD TO COMBINATORX. If requested by
CombinatoRx, Fovea shall supply formulated Collaboration Combinations for the
purpose of CombinatoRx conducting Phase III Studies and for commercializing a
Selected Collaboration Product, at the same price paid by Fovea to a Third Party
manufacturer. CombinatoRx shall have the right to obtain formulated
Collaboration Combinati


 
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