As executed

This Agreement is dated 2 July, 1999

BY AND BETWEEN

EMISPHERE TECHNOLOGIES, INC.,

a corporation incorporated under the laws of the State of Delaware, USA, having
its executive offices at 765 Old Saw Mill River Road, Tarrytown, NY 10591, USA
as more fully described in the definition of "Emisphere" contained in the
definition section.

AND

ELAN CORPORATION, PLC.,

an Irish company of Lincoln House, Lincoln Place, Dublin 2, Ireland as more
fully described in the definition of "Elan" contained in the definition section.

                                LICENSE AGREEMENT

[* * *] = This provision is subject to a request for confidential treatment.



                                TABLE OF CONTENTS


                                                                 Page No.
                                                                 --------
CLAUSE 1.  DEFINITIONS..................................................1

CLAUSE 2.  GRANT OF RIGHTS..............................................6

CLAUSE 3.  IMPROVEMENTS.................................................8

CLAUSE 4.  INTELLECTUAL PROPERTY RIGHTS.................................8

CLAUSE 5.  FINANCIAL PROVISIONS.........................................8

CLAUSE 6.  RIGHT OF AUDIT AND INSPECTION...............................11

CLAUSE 7.  PATENTS.....................................................11

CLAUSE 8.  CONFIDENTIAL INFORMATION....................................12

CLAUSE 9.  TERM OF AGREEMENT...........................................14

CLAUSE 10. WARRANTIES AND INDEMNITIES..................................16

CLAUSE 11. REGULATORY APPROVALS .......................................17

CLAUSE 12. EXPLOITATION................................................18

CLAUSE 13. INSURANCE...................................................18

CLAUSE 14. IMPOSSIBILITY OF PERFORMANCE - FORCE MAJEURE................18

CLAUSE 15. SETTLEMENT OF DISPUTES; PROPER LAW..........................18

CLAUSE 16. ASSIGNMENT..................................................19

CLAUSE 17. NOTICES.....................................................19

CLAUSE 18. MISCELLANEOUS CLAUSES.......................................20

                                        i


WHEREAS

Emisphere desires to enter into this Agreement with Elan so as to obtain a
non-exclusive licence of the Elan Patent and the Elan Know-How for the Field to
package, import, use, offer for sale and sell the Product(s) in the Territory.

NOW IT IS HEREBY AGREED AS FOLLOWS:

1.       DEFINITIONS

         1.1 In this present Agreement, including the Recitals, Schedules and
         Appendices, the following definitions shall prevail unless the context
         otherwise requires:

"Affiliate"             means any corporation or other entity controlling,
                        controlled or under the common control of
                        Emisphere or Elan, as the case may be.  For the
                        purpose of this definition, "control" shall mean
                        direct or indirect ownership of fifty percent (50%)
                        or more of the stock or shares entitled to vote for
                        the election of directors or if not meeting the
                        preceding criteria, the power to direct or cause the
                        direction of management and strategic decisions of
                        that corporation or other entity;

"Agreement"             means this agreement (which expression shall be
                        deemed to include the Recitals, the Schedules and
                        Appendices hereto);

"Carriers"              means the agents SNAC and SNAD only
                        that are used to facilitate
                        transport through membranes,
                        including oral, nasal, buccal,
                        intraocular, sublingual,
                        subcutaneous, intramuscular and
                        pulmonary delivery of the Compounds.

"Compounds"             means Heparin and/or Heparinoids;

"Effective Date"        means the date of signing of this Agreement by the
                        parties.

"Elan"                  means Elan Corporation, plc, and its
                        successors and permitted assigns,
                        but excluding its Affiliates save as
                        specifically included in any
                        provision of this Agreement.

                                        1


"Elan Know-How"         means only the specific know-how
                        which is disclosed in the Elan
                        Patent, whether or not covered
                        by any patent, copyright, design
                        patent, trademark, trade secret or
                        other industrial or any intellectual
                        property rights.

                        For the avoidance of doubt, Elan
                        Know-How shall not include:

                        (i)      any improvements to the
                                 Elan Know-How invented,
                                 created, conceived or
                                 developed by Elan or its
                                 Affiliates or by any third
                                 party on their behalf;

                        (ii)     any know-how other than the
                                 Elan Know-How owned,
                                 licensed or controlled by
                                 Elan or its Affiliates on
                                 the Effective Date or
                                 subsequent to the Effective
                                 Date;

                        (iii)    any know-how owned by or licensed to
                                 Affiliates of Elan  including, without
                                 limitation, [* * *] which
                                 incorporates, inter alia, [* * *].

"Elan Patent"           means [* * *] filed by Elan on [* * *] and
                        [* * *] filed by Elan on [* * *].

                        For the avoidance of doubt, the Elan
                        Patent shall not include:

                        (i)      any improvements to the
                                 Elan Patent invented,
                                 created, conceived or
                                 developed by Elan or its
                                 Affiliates or by any third
                                 party on their behalf;

                        (ii)     any patent(s) other than
                                 the Elan Patent owned,
                                 licensed or controlled by
                                 Elan or its Affiliates on
                                 the Effective Date or
                                 subsequent to the Effective
                                 Date;

                                        2


                        (iii)    any patent owned by or licensed to Affiliates
                                 of Elan including, without limitation, [* * *]
                                 which incorporates, inter alia, [* * *].

"Emisphere"             means Emisphere Technologies, Inc., its Affiliates,
                        successors and permitted assigns;

"Field"                 means the research, development and optimisation
                        of the Compounds solely utilising the Carriers, or
                        a combination of the Carriers, for all medical
                        ailments or indications whatever the mode of
                        administration, as well as the manufacture, use,
                        promotion, distribution, marketing and sale of the
                        Product(s);

"FDA"                   means the United States Food and Drug
                        Administration or any successors or agency the
                        approval of which is necessary to market a product
                        in the United States of America or any other
                        relevant regulatory authority the approval of which
                        is necessary to market a product in any other
                        country of the Territory;

"Heparin"               means naturally occurring forms of Heparin,
                        including Heparin USP, BP and EP as well as
                        smaller molecular fractions thereof;

"Heparinoids"           means various sulphated polysaccharides that have
                        anti-coagulant activity resembling that of Heparin;

"INDA"                  means any Investigational New Drug
                        Application in relation to any
                        Product(s) filed by Emisphere with
                        the FDA or a similar application
                        filed in another jurisdiction;

"In Market"             means the sale of any Product(s) by
                        Emisphere or its Affiliates, or
                        where applicable by a permitted
                        sub-licensee, to an unaffiliated
                        third party such as a wholesaler,
                        distributor, managed care
                        organisation, hospital or pharmacy
                        and the like and

                                        3


                        shall exclude the transfer pricing of the Product(s)
                        by Emisphere to an Affiliate or a permitted sub-
                        licensee;

"NDA"                   means any New Drug Application in relation to any
                        Product(s) filed by Emisphere with the FDA or a
                        similar application filed in another jurisdiction;

"Net Revenues"          means any proceeds or other amounts received by
                        Emisphere in relation to Product(s) including, inter
                        alia, license royalties and excluding Net Sales, and
                        proceeds or other amounts received for research and
                        development and clinical trials [* * *].

"Net Sales"             means:

                        (i)      in the case of any Product(s) sold by Emisphere
                                 In Market, that sum determined by deducting
                                 from the aggregate gross In Market sales
                                 proceeds billed for the Product(s) by
                                 Emisphere, [* * *] together with deductions in
                                 accordance with [* * *] US GAAP, subject to a
                                 deduction in respect of uncollectible accounts
                                 (up to a cumulative maximum of [* * *]), and
                                 less ordinary and customary trade discounts and
                                 commissions, excise taxes, withholding tax,
                                 other consumption taxes, and credits or
                                 allowances actually granted on account of
                                 rejection or return of the Product(s);

                        (ii)     where Emisphere does not sell In Market (in
                                 whole), that sum determined by deducting from
                                 the aggregate royalties on sales of any
                                 Product(s) received by Emisphere from a
                                 permitted sublicensee, [* * *]

                                        4


                                 together with deductions in accordance with
                                 [* * *] US GAAP, subject to a deduction in
                                 respect of uncollectible accounts (up to a
                                 cumulative maximum of [* * *]), and less
                                 ordinary and customary trade discounts and
                                 commissions, excise taxes, withholding tax,
                                 other consumption taxes, and credits or
                                 allowances actually granted on account of
                                 rejection or return of the Product(s).

[* * *]
Net Revenues"                    [* * *]

[* * *]
Net Revenues"                    [* * *]

[* * *]
Net Revenues"                    [* * *]

"Product(s)"                     means oral dosage forms of the
                                 Compound(s) in conjunction with the
                                 Carriers, or a combination of the
                                 Carriers, [* * *]

"Product Manufacturing
Cost"                            shall mean the costs to Emisphere
                                 directly related to the manufacture
                                 of any Product, calculated in
                                 accordance with the provisions of
                                 Schedule 1.

"SNAC"                           means Sodium N-[8-(2-hydroxybenzoyl)amino]
                                 caprylate, its free acid, esters thereof and
                                 other pharmaceutically accepted salt forms
                                 thereof;

                                        5


"SNAD"                           means Sodium N-[10-(2-hydroxybenzoyl)amino]
                                 decanoate, its free acid, esters thereof and
                                 other pharmaceutically accepted salt forms
                                 thereof;

"Technological Competitor"       shall mean a company, corporation or person
                                 having a substantial part of its business,
                                 research, development and/or manufacturing in
                                 the drug delivery area of the pharmaceutical
                                 industry.

"Termination Agreement"          means the Termination Agreement of even date
                                 herewith between Elan, Emisphere and Ebbisham
                                 Limited.

"Territory"                      means all the countries of the world; and

"United States Dollars"          means the lawful currency for the time being
and "US$"                        of the United States of America.

         1.2        In this Agreement

                    1.2.1   The singular includes the plural and vice versa, the
                            masculine includes the feminine and vice versa.

                    1.2.2   Any reference to a Clause or Schedule shall, unless
                            otherwise specifically provided, be to a Clause or
                            Schedule of this Agreement.

                    1.2.3   The headings of this Agreement are for ease of
                            reference only and shall not affect its construction
                            or interpretation.

2.       GRANT OF RIGHTS

         2.1        Subject to the terms of this Agreement, Elan hereby grants
                    to Emisphere and Emisphere hereby accepts for the term of
                    this Agreement a non-exclusive license of the Elan Patent
                    and the Elan Know-How solely in the Field to package,
                    import, use, offer for sale and sell Product(s) in the
                    Territory.

         2.2        All proprietary rights and rights of ownership with respect
                    to the Elan Patent and the Elan Know-How shall at all times
                    remain solely with Elan. Emisphere shall not have any rights
                    to use the Elan Patent or the Elan Know-How other than
                    insofar as they relate directly to the Field and are
                    expressly granted herein.

                                        6


         2.3        For the avoidance of doubt and subject only to the
                    non-exclusive license granted to Emisphere hereunder [* * *]
                    of the Termination Agreement, the parties hereby acknowledge
                    and agree that, following the Effective Date, Elan (and each
                    of its Affiliates) shall be free to license, sub-license,
                    commercialize in any way and otherwise use all of its
                    patents, know-how and other intellectual property rights in
                    relation to or in connection with all and any applications
                    and uses, including for the avoidance of doubt, in relation
                    to the Compounds, or otherwise, whether alone or in
                    conjunction with any third party.

         2.4        Sub-licensing by Emisphere:

                    2.4.1   Emisphere shall be entitled, subject to the prior
                            written consent of Elan which shall not be
                            unreasonably withheld or delayed, to grant
                            sub-licences of the Elan Patent and the Elan
                            Know-How solely in the Field to package, import,
                            use, offer for sale and sell Product(s) in one or
                            more countries of the Territory, provided that
                            Emisphere shall not grant a sub-licence to a
                            Technological Competitor of Elan.

                    2.4.2   Any sub-licence granted hereunder shall be in the
                            same terms mutatis mutandis as the terms of this
                            Agreement insofar as they are applicable, but
                            excluding the right to grant a sub-licence.

                    2.4.3   For the avoidance of doubt, Emisphere shall use its
                            reasonable endeavours to ensure that Elan shall have
                            the same rights of audit and inspection vis-a-vis a
                            sub-licensee, as Elan has pursuant to this Agreement
                            concerning Emisphere.

                    2.4.4   Emisphere shall be liable to Elan for all acts and
                            omissions of any sub-licensee as though such acts
                            and omissions were by Emisphere and Emisphere shall
                            provide the indemnity to Elan outlined in Clause 10.

                    2.4.5   Where a sub-licence has been granted under Clause
                            2.4.1, such sub-licence shall automatically
                            terminate if this Agreement terminates for the
                            country or countries covered by the sub- licence.

                    2.4.6   For the avoidance of doubt the parties agree that
                            any sub-licence granted pursuant to this Clause 2.4
                            shall not be capable of surviving the termination of
                            this Agreement.

                                        7


3.       IMPROVEMENTS

         3.1        Emisphere shall have no right hereunder or otherwise to any
                    improvements to the Elan Patent and/or the Elan Know-How
                    invented, created, conceived or developed by Elan or its
                    Affiliates, or by any third party on their behalf.

         3.2        Elan shall remain the sole and exclusive owner of any
                    improvements to the Elan Patent and/or the Elan Know-How
                    invented, created, conceived or developed by Elan or its
                    Affiliates, or by any third party on their behalf at any
                    time.

4.       INTELLECTUAL PROPERTY RIGHTS

         Elan shall remain the sole and exclusive owner of the Elan Patent and
         the Elan Know-How.

5.       FINANCIAL PROVISIONS

         5.1        Licence Royalty:

                    In consideration of the licence of the Elan Patent granted
                    to Emisphere under this Agreement, Emisphere shall pay to
                    Elan a non-refundable license royalty of [* * *] upon
                    execution of the Agreement by both parties, receipt of which
                    is hereby acknowledged by Elan.

         5.2        Royalties on [* * *] Net Revenues:

                    In consideration of the licence of the Elan Patent to
                    Emisphere hereunder, the royalties payable by Emisphere to
                    Elan on [* * *] Net Revenues, in respect of Product(s), for
                    the term of this Agreement, shall be as follows:

                    5.2.1   subject to Clause 5.2.2, [* * *] of
                            [* * *];

                    5.2.2   royalties shall be payable by Emisphere to Elan on
                            [* * *] pursuant to the provisions of Clause 5.2.1
                            subject to the following conditions:

                                        8


                            (1)        the parties agree that any [* * *] Net
                                       Revenues shall be deemed to be [* * *]
                                       Net Revenues solely for the purpose of
                                       determining whether the [* * *];

                            (2)        for the avoidance of doubt, where the
                                       [* * *], shall not be subject to the
                                       payment by Emisphere to Elan of royalties
                                       pursuant to Clause 5.2.1;

                            (3)        for the avoidance of doubt, the parties
                                       acknowledge that a determination that the
                                       [* * *] by a [* * *] Product [* * *], and
                                       all [* * *] (whether in respect of one or
                                       [* * *]) shall be subject to the payment
                                       by Emisphere to Elan of royalties
                                       pursuant to Clause 5.2.1 [* * *].

         5.3        Royalties on [* * *] Net Revenues and Net Sales:

                           In consideration of the licence of the Elan Patent to
                           Emisphere hereunder, the royalties payable by
                           Emisphere to Elan on [* * *] Net Revenues and Net
                           Sales in respect of Product(s), for the term of this
                           Agreement, shall be as follows:

                    5.3.1   subject to Clause 5.3.2, [* * *] of [* * *] Net
                            Revenues and [* * *] of Net Sales;

                    5.3.2   the [* * *] royalties which shall be payable by
                            Emisphere to Elan on the [* * *] of [* * *] Net
                            Revenues and Net Sales [* * *] of the Agreement
                            shall be [* * *].

         5.4        Payment of royalties shall be made [* * *] within thirty
                    [* * *] after the expiry of the [* * *]. The method of
                    payment shall be by way of wire transfer to an
                    account specified by Elan. Each payment made to Elan shall
                    be accompanied by a written report, prepared and signed by a
                    senior financial officer of Emisphere. In addition, the
                    report

                                        9


                    shall clearly show the Net Revenues and Net Sales for the
                    months of the [* * *] for which payment is being
                    made on a country by country basis. In the event that no
                    royalty is due to Elan for any [* * *] period, the senior
                    financial officer shall so report.

         5.5        Emisphere shall maintain and keep clear, detailed, complete,
                    accurate and separate records so:

                    5.5.1   as to enable any royalties on Net Revenues and Net
                            Sales which shall have accrued hereunder to be
                            determined; and

                    5.5.2   that any deductions made in arriving at the Net
                            Revenues and Net Sales can be determined.

         5.6        All payments due hereunder shall be made in United States
                    Dollars. Payments due on Net Revenues and Net Sales made in
                    a currency other than United States Dollars shall first be
                    calculated in the foreign currency and then converted to
                    United States Dollars on the basis of the exchange rate in
                    effect for the purchase of United States Dollars with such
                    foreign currency quoted in the Wall Street Journal (or
                    comparable publication if not quoted in the Wall Street
                    Journal) with respect to the currency of the country of
                    origin of such payment for the day prior to the date on
                    which the payment by Emisphere is being made.

         5.7        Subject to the provisions of this Agreement, Emisphere shall
                    pay all royalties at full rate.

         5.8        If, at any time, legal restrictions in the Territory prevent
                    the prompt payment of running royalties or any portion
                    thereof, the parties shall meet to discuss suitable and
                    reasonable alternative methods of reimbursing Elan the
                    amount of such running royalties. In the event that
                    Emisphere is prevented from making any payment under this
                    Agreement by virtue of the statutes, laws, codes or
                    government regulations of the country from which the payment
                    is to be made, then such payments may be paid by depositing
                    them in the currency in which they accrue to Elan's account
                    in a bank acceptable to Elan in the country the currency of
                    which is involved or as otherwise agreed by the parties.

         5.9        Elan and Emisphere agree to co-operate in all respects
                    necessary to take advantage of any double taxation
                    agreements or similar agreements as may, from time to time,
                    be available.

         5.10       Any taxes payable by Elan on any payment made to Elan
                    pursuant to this agreement shall be for the account of Elan.
                    If so required by applicable law any payment made pursuant
                    to this Agreement shall be made by Emisphere after deduction
                    of the appropriate withholding tax, in which

                                       10


                    event the parties shall co-operate to obtain the appropriate
                    tax clearance as soon as is practicable. On receipt of such
                    clearance, Emisphere shall forthwith procure that the amount
                    so withheld is paid to Elan.

         5.11       Method of calculation of royalties and fees:

                    The parties acknowledge and agree that the methods for
                    calculating the royalties and fees hereunder are for the
                    purposes of the convenience of the parties, are freely
                    chosen and not coerced.

6.       RIGHT OF AUDIT AND INSPECTION

         6.1        Not more than once in each calendar year, Emisphere shall
                    permit an internationally-recognised independent firm of
                    Chartered Accountants upon reasonable notice and at any
                    reasonable time during normal business hours to have access
                    to inspect and audit the accounts and records of Emisphere
                    relating to the calculation of the royalty payments on Net
                    Revenues and Net Sales submitted to Elan. Any such
                    inspection of Emisphere's records shall be at the expense of
                    Elan, except that if any such inspection reveals a
                    deficiency in the amount of the running royalty actually
                    paid to Elan hereunder in any calendar year of [* * *] or
                    more of the amount of any running royalty actually due to
                    Elan hereunder, then the expense of such inspection shall be
                    borne solely by Emisphere. Any amount of deficiency shall be
                    paid promptly to Elan. If such inspection reveals a surplus
                    in the amount of running royalty actually paid to Elan by
                    Emisphere, Elan shall promptly reimburse Emisphere the
                    surplus.

         6.2        In the event of any unresolved dispute regarding any alleged
                    deficiency or overpayment of royalty payments hereunder, the
                    matter will be referred to [* * *] for a resolution of such
                    dispute. Any decision by the [* * *] shall be [* * *] on the
                    parties.

7.       PATENTS

         7.1        Elan, at its expense, shall [* * *] to maintain in force any
                    [* * *] issued letters patent within the Elan Patent that
                    relate to the Field. Elan shall have the right in its
                    discretion to control such maintenance provided that
                    Emisphere at its request shall be provided with copies of
                    documents relating to such maintenance.

         7.2        Elan and Emisphere shall promptly inform each other in
                    writing of any alleged infringement of any patents within
                    the Elan Patent by a third

                                       11


                    party of which it becomes aware and provide the other with
                    any available evidence of such infringement insofar as such
                    infringements relate solely to the Field.

         7.3        Elan shall have the right to prosecute at its own expense
                    and for its own benefit any infringements of the Elan Patent
                    including any infringements that relate solely to the Field.
                    At Elan's request and expense, Emisphere shall co-operate
                    with such action. Should Elan decide not to pursue such
                    infringers insofar as such infringements relate solely to
                    the Field, within a reasonable period but in any event
                    within 20 days after receiving written notice of such
                    alleged infringement, Emisphere may in its discretion
                    initiate such proceedings in its own name at its expense and
                    for its own benefit and at Emisphere's request and expense,
                    Elan shall cooperate with such action.

8.       CONFIDENTIAL INFORMATION

         8.1        The parties acknowledge that it may be necessary, from time
                    to time, solely for the purposes of each party performing
                    this Agreement, to disclose to each other confidential and
                    proprietary information ("Confidential Information").

         8.2        Any Confidential Information revealed by a party to another
                    party shall be used by the receiving party exclusively for
                    the purposes of fulfilling the receiving party's obligations
                    under this Agreement and for no other purpose.

         8.3        Each party agrees to disclose Confidential Information of
                    another party only to those employees, representatives and
                    agents requiring knowledge thereof in connection with their
                    duties directly related to the fulfilling of the party's
                    obligations under this Agreement. Each party further agrees
                    to inform all such employees, representatives and agents of
                    the terms and provisions of this Agreement and their duties
                    hereunder and to obtain their consent hereto as a condition
                    of receiving Confidential Information. Each party agrees
                    that it will exercise the same degree of care, but in no
                    event less than a reasonable degree, and protection to
                    preserve the proprietary and confidential nature of the
                    Confidential Information disclosed by a party, as the
                    receiving party would exercise to preserve its own
                    proprietary and confidential information. Each party agrees
                    that it will, upon request of a party, return all documents
                    and any copies thereof containing Confidential Information
                    belonging to or disclosed by such party.

         8.4        Any breach of this Clause 8 by any of the persons informed
                    by one of the parties is considered a breach by the party
                    itself.

                                       12


                    Confidential Information shall not be deemed to include:

                    (i)     information that is in the public domain;

                    (ii)    is in the possession of the recipient at the time of
                            disclosure;

                    (iii)   information which is independently developed by a
                            party;

                    (iv)    information that becomes available to a party on a
                            non- confidential basis from a third party who is
                            under no confidentiality obligations to the party
                            disclosing Confidential Information

         8.5        If any party or any of its representatives or Affiliates
                    becomes legally compelled (by deposition, interrogatory,
                    request for documents, subpoena, civil investigative demand
                    or similar process) to disclose any of the other party's
                    Confidential Information, such party shall provide the other
                    party with prompt prior written notice and may disclose that
                    portion of the other party's Confidential Information that
                    is legally required and shall [* * *] obtain (and shall
                    cooperate with the other party's efforts to obtain)
                    assurance that confidential treatment will be accorded the
                    other party's Confidential Information.

                    If either party is required by law to make any public
                    disclosure, including any public filings required to be made
                    under the rules or regulations of the U.S. Securities and
                    Exchange Commission, the Nasdaq Stock Market or other
                    national securities exchange, otherwise prohibited by this
                    Agreement, such party shall provide the other party with
                    prompt prior written notice and may disclose that portion of
                    the other party's Confidential Information that is legally
                    required and shall [* * *] obtain (and shall cooperate with
                    the other party's efforts to obtain) assurance that
                    confidential treatment will be accorded the other party's
                    Confidential Information.

         8.6        The parties agree that the obligations of this Clause 8 are
                    necessary and reasonable in order to protect the parties'
                    respective businesses, and each party expressly agrees that
                    monetary damages would be inadequate to compensate a party
                    for any breach by the other party of its covenants and
                    agreements set forth herein. Accordingly, the parties agree
                    and acknowledge that any such violation or threatened
                    violation will cause irreparable injury to a party and that,
                    in addition to any other remedies that may be available, in
                    law and equity or otherwise, any party shall be entitled to
                    obtain injunctive relief against the threatened breach of
                    the provisions of this Clause 8, or a continuation of any
                    such breach by the other party, specific performance and
                    other equitable relief to redress

                                       13


                    such breach together with its damages and reasonable counsel
                    fees and expenses to enforce its rights hereunder, without
                    the necessity of proving actual or express damages.

         8.7        Subject only to the specific exceptions set forth in this
                    Clause 8 and Clause 8.4 of the Termination Agreement, none
                    of the parties shall disclose the existence of this
                    Agreement or the other agreements entered into by the
                    parties on the Effective Date, the subject matter hereof nor
                    originate any publicity, new release or other public
                    announcement, written or oral without the written consent of
                    the other parties.

9.       TERM OF AGREEMENT

         9.1        Subject to the rights of earlier termination set out in
                    Clauses 9.3 and 9.4, this Agreement commences as of the
                    Effective Date and expires [* * *] on the [* * *]:

                    9.1.1   [* * *] years starting from the date of the [* * *]
                            the Product [* * *]; or

                    9.1.2   the last to expire patent included in the Elan
                            Patent.

         9.2        At the end of the term as specified in Clause 9.1 above (the
                    "Initial Period"), the Agreement may continue for an
                    additional period or periods of [* * *] if both parties so
                    agree in writing.

         9.3        In addition to the rights of early or premature termination
                    provided for elsewhere in this Agreement, in the event that
                    any of the terms or provisions hereof are incurably breached
                    by either party, the non-breaching party may immediately
                    terminate this Agreement by written notice.

                    Subject to the other provisions of this Agreement, in the
                    event of any other breach, the non-breaching party may
                    terminate this Agreement by giving written notice to the
                    breaching party that this Agreement will terminate on the
                    [* * *] day from notice unless cure is sooner effected. If
                    the breaching party has proposed a course of action to
                    rectify the breach and is acting in good faith to rectify
                    same but has not cured the breach by the [* * *] day, the
                    said period shall be extended by such period as is
                    reasonably necessary to enable the breach to be cured.

         9.4        If at any time during the term of this Agreement, an "Event
                    of Bankruptcy" (as defined below) relating to Emisphere
                    occurs, Elan shall

                                       14


                    have, in addition to all other legal and equitable rights
                    and remedies available hereunder, the option to terminate
                    this Agreement upon [* * *] written notice, given within
                    [* * *] days following the date that Elan becomes aware of
                    the Event of Bankruptcy.

                    As used in this Clause 9.4, the term "Event of Bankruptcy"
         shall mean:

                    9.4.1   the appointment of a liquidator, receiver,
                            administrator, examiner, trustee or similar officer
                            of either party or over all or a substantial part of
                            its assets under the law of any applicable
                            jurisdiction, including without limit, the United
                            States of America; or

                    9.4.2   an application or petition for bankruptcy, corporate
                            re-organisation, composition, administration,
                            examination, arrangement or any other procedure
                            similar to any of the foregoing under the law of any
                            applicable jurisdiction, including without limit,
                            the United States of America, is filed, and is not
                            discharged within [* * *], or if either
                            party applies for or consents to the appointment of
                            a receiver, administrator, examiner or similar
                            officer of it or of all or a material part of its
                            assets, rights or revenues or the assets and/or the
                            business of either party are for any reason seized,
                            confiscated or condemned.

         9.5        Upon exercise of those rights of termination as specified in
                    Clause 9.1 to Clause 9.4 inclusive or elsewhere within the
                    Agreement, this Agreement shall, subject to the other
                    provisions of the Agreement, automatically terminate
                    forthwith and be of no further legal force or effect.

         9.6        Upon expiration or termination of the Agreement:

                    9.6.1   any sums that were due from Emisphere to Elan on Net
                            Revenues or Net Sales in the Territory or in such
                            particular country or countries in the Territory, as
                            the case may be, prior to the expiration or
                            termination of this agreement as set forth herein
                            shall be paid in full within [* * *] of the
                            expiration or termination of this Agreement for the
                            Territory or for such particular country or
                            countries in the Territory, as the case may be;

                    9.6.2   all confidentiality provisions set out herein shall
                            remain in full force and effect;

                    9.6.3   all responsibilities and warranties shall insofar as
                            are appropriate remain in full force and effect;

                                       15


                    9.6.4   the rights of inspection and audit set out in Clause
                            6 shall continue in force for a period of one year;

                    9.6.5   all rights, licenses and sublicenses granted in and
                            pursuant to this Agreement shall cease for the
                            Territory or for such particular country or
                            countries in the Territory, as the case may be.
                            Following such expiration or termination, Emisphere
                            may not thereafter use in the Territory or in such
                            particular country or countries in the Territory, as
                            the case may be, (a) the Elan Patent; and/or (b) any
                            Elan Know-How that remains confidential or otherwise
                            proprietary to Elan.

10.      WARRANTIES AND INDEMNITIES

         10.1       Emisphere shall assume the sole and entire responsibility
                    and shall indemnify and save harmless Elan and its
                    Affiliates from:

                    10.1.1  any and all claims, liabilities, expenses, including
                            reasonable attorney's fees, responsibilities and
                            damages by reason of any claim, proceedings, action,
                            liability or injury arising out of the manufacture,
                            transport, packaging, storage, handling,
                            distribution, marketing, advertising, promotion or
                            sale of the Product(s) by Emisphere, or any of its
                            Affiliates or any third party on behalf of
                            Emisphere;

                    10.1.2  any and all claims, liabilities, expenses, including
                            reasonable attorney's fees, responsibilities and
                            damages by reason of any claim, proceedings, action,
                            liability or injury arising out of any infringement
                            by the Product(s) of the intellectual property
                            rights of any third party.

         10.2       With reference to Clause 2, Emisphere shall indemnify and
                    hold harmless Elan and its Affiliates to the extent that any
                    claims, damages, liabilities, claims, costs or expenses
                    arise out of any such acts or omissions of any sub-licensee.

         10.3       As a condition of obtaining an indemnity in the
                    circumstances set out above, Elan (and/or the relevant
                    Affiliate) shall:

                    10.3.1  fully and promptly notify Emisphere of any claim or
                            proceeding, or threatened claim or proceeding;

                    10.3.2  permit Emisphere to take full care and control of
                            such claim or proceeding;

                                       16


                    10.3.3  reasonably co-operate in the investigation and
                            defence of such claim or proceeding;

                    10.3.4  not compromise or otherwise settle any such claim or
                            proceeding without the prior written consent of
                            Emisphere, which consent shall not be unreasonably
                            withheld, conditioned or delayed; and

                    10.3.5  take all reasonable steps to mitigate any loss or
                            liability in respect of any such claim or
                            proceeding.

         10.4       ELAN IS GRANTING THE LICENSE HEREUNDER ON AN "AS
                    IS" BASIS WITHOUT REPRESENTATION OR WARRANTY
                    WHETHER EXPRESS OR IMPLIED (FROM ELAN OR ANY OF
                    ITS AFFILIATES), INCLUDING WARRANTIES OF MERCHANT
                    ABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR
                    INFRINGEMENT OF THIRD PARTY RIGHTS, AND ALL SUCH
                    WARRANTIES ARE EXPRESSLY DISCLAIMED.

                    WITHOUT PREJUDICE TO THE PROVISIONS OF CLAUSE 10.1 AND 10.2
                    HEREOF AND ANY OTHER EXPRESS REPRESEN TATIONS, WARRANTIES,
                    INDEMNITIES OR OBLIGATIONS OF EMISPHERE HEREUNDER, EMISPHERE
                    HEREBY DISCLAIMS ANY AND ALL IMPLIED REPRESENTATIONS OR
                    WARRANTIES.

         10.5       NOTWITHSTANDING ANYTHING TO THE CONTRARY IN
                    THIS AGREEMENT, ELAN (AND ITS AFFILIATES) AND
                    EMISPHERE SHALL NOT BE LIABLE TO THE OTHER BY
                    REASON OF ANY REPRESENTATION OR WARRANTY,
                    CONDITION OR OTHER TERM OR ANY DUTY OF COMMON
                    LAW, OR UNDER THE EXPRESS TERMS OF THIS
                    AGREEMENT, FOR ANY CONSEQUENTIAL OR INCIDENTAL
                    OR PUNITIVE LOSS OR DAMAGE (WHETHER FOR LOSS OF
                    PROFITS OR OTHERWISE) AND WHETHER OCCASIONED BY
                    THE NEGLIGENCE OF THE RESPECTIVE PARTIES, THEIR
                    EMPLOYEES OR AGENTS OR OTHERWISE.

11.      REGULATORY APPROVALS

         11.1       For the avoidance of doubt, Emisphere shall have full
                    responsibility for its dealings with the FDA relating to the
                    Product(s) and Elan shall have no responsibility of any
                    nature relating thereto.

                                       17


         11.2       Any and all INDAs and other applications for regulatory
                    approval filed hereunder for the Product(s) shall remain the
                    property of Emisphere.

         11.3       For the avoidance of doubt, the costs and expenses of any
                    filings and proceedings made by Emisphere to the FDA,
                    including post approval studies required by the FDA in
                    respect of the Product(s), and to maintain the FDA approval
                    relating thereto, shall be paid by Emisphere.

12.      EXPLOITATION

         12.1       Emisphere will be solely responsible for ensuring that the
                    manufacture, promotion, distribution, marketing and sale of
                    the product(s) within each country of the Territory is in
                    strict accordance with all the legal and regulatory
                    requirements of each country of the Territory.

         12.2       All advertising, promotional materials and marketing costs
                    needed to exploit the product(s) are to be paid by
                    Emisphere.

13.      INSURANCE

         Emisphere shall maintain adequate comprehensive general liability
         insurance, including product liability insurance, on the Product(s)
         manufactured and/or sold by Emisphere that incorporate intellectual
         property licensed by Elan to Emisphere hereunder (or by a third party
         on its behalf).

14.      IMPOSSIBILITY OF PERFORMANCE - FORCE MAJEURE

         14.1       Neither Party to this Agreement shall be liable for delay in
                    the performance of any of its obligations hereunder if such
                    delay results from causes beyond its reasonable control,
                    including, without limitation, acts of God, fires, strikes,
                    acts of war, or intervention of a government authority or
                    non availability of raw materials, but any such delay or
                    failure shall be remedied by such party as soon as
                    practicable.


15.      SETTLEMENT OF DISPUTES; PROPER LAW

         15.1       The parties will attempt in good faith to resolve any
                    dispute arising out of or relating to this Agreement
                    promptly by negotiation between executives of the parties.
                    In the event that such negotiations do not result in a
                    mutually acceptable resolution, the parties agree to
                    consider other dispute resolution mechanisms including
                    mediation. In the event that the parties fail to agree on a
                    mutually acceptable dispute resolution

                                       18


                    mechanism, any such dispute shall be finally settled by the
                    courts of competent jurisdiction. The parties hereby submit
                    to the jurisdiction of the state and Federal courts located
                    in the state of New York and the courts of Ireland and the
                    parties hereby waive any and all defences of improper venue
                    or that the forum is inconvenient.

         15.2       This Agreement shall be governed by and construed in
                    accordance with the laws of Ireland.

16.      ASSIGNMENT

         16.1       This Agreement may not be assigned by either party without
                    the prior written consent of the other, which consent shall
                    not be unreasonably withheld, conditioned or delayed, save
                    that either party may assign this Agreement to any Affiliate
                    without such consent, and that Elan may assign this
                    Agreement to [* * *] without such prior written consent;
                    provided that such assignment does not have any adverse tax
                    consequences on the other party.

                    Elan and Emisphere will discuss any assignment by either
                    party to an Affiliate prior to its implementation in order
                    to avoid or reduce any additional tax liability to the other
                    party resulting solely from different tax law provisions
                    applying after such assignment to an Affiliate. For the
                    purpose hereof, an additional tax liability shall be deemed
                    to have occurred if either party would be subject to a
                    higher net tax on payments made hereunder after taking into
                    account any applicable tax treaty and available tax credits
                    than such party was subject to before the proposed
                    assignment.

17.      NOTICES

         17.1       Any notice to be given under this Agreement shall be sent in
                    writing in English by registered airmail or telefaxed to the
                    following addresses:

                    If to Emisphere:

                    Emisphere Limited
                    765 Old Saw Mill River Road
                    Tarrytown, NY  10591
                    Attention:         Chief Financial Officer
                    Telephone:         001 914 785 4763
                    Telefax:           001 914 593 8292

                                       19


                    If to Elan:

                    Elan Corporation plc
                    Lincoln House
                    Lincoln Place
                    Dublin 2
                    Ireland
                    Attention:         Vice President, General Counsel, Elan
                                       Pharmaceutical Technologies
                    Telephone:         353 1 7094301
                    Telefax :          353 1 7094124

                    or to such other address(es) and telefax numbers as may from
                    time to time be notified by either party to the other
                    hereunder.

         17.2       Any notice sent by mail shall be deemed to have been
                    delivered within seven (7) working days after despatch and
                    any notice sent by telex or telefax shall be deemed to have
                    been delivered within twenty four (24) hours after the time
                    of the despatch. Notice of change of address shall be
                    effective upon receipt.

18.      MISCELLANEOUS CLAUSES

         18.1       No waiver of any right under this Agreement shall be deemed
                    effective unless contained in a written document signed by
                    the party charged with such waiver, and no waiver of any
                    breach or failure to perform shall be deemed to be a waiver
                    of any other breach or failure to perform or of any other
                    right arising under this Agreement.

         18.2       If any provision in this Agreement is agreed by the parties
                    to be, or is deemed to be, or becomes invalid, illegal, void
                    or unenforceable under any law that is applicable hereto,
                    (i) such provision will be deemed amended to conform to
                    applicable laws so as to be valid and enforceable or, if it
                    cannot be so amended without materially altering the
                    intention of the parties, it will be deleted, with effect
                    from the date of such agreement or such earlier date as the
                    parties may agree, and (ii) the validity, legality and
                    enforceability of the remaining provisions of this Agreement
                    shall not be impaired or affected in any way.

         18.3       The parties shall use their respective reasonable endeavours
                    to ensure that the parties and any necessary third party
                    shall do, execute and perform all such further deeds,
                    documents, assurances, acts and things as any of the parties
                    hereto may reasonably require by notice in writing to the
                    other party or such third party to carry out the provisions
                    of this Agreement.

                                       20


         18.4       This Agreement shall be binding upon and enure to the
                    benefit of the parties hereto, their successors and
                    permitted assigns and sub-licenses.

         18.5       No provision of this Agreement shall be construed so as to
                    negate, modify or affect in any way the provisions of any
                    other agreement between the parties unless specifically
                    referred to, and solely to the extent provided, in any such
                    other agreement.

         18.6       No amendment, modification or addition hereto shall be
                    effective or binding on either party unless set forth in
                    writing and executed by a duly authorised representative of
                    each party.

         18.7       This Agreement may be executed in any number of
                    counterparts, each of which when so executed shall be deemed
                    to be an original and all of which when taken together shall
                    constitute this Agreement.

         18.8       Each of the parties undertakes to do all things reasonably
                    within its power which are necessary or desirable to give
                    effect to the spirit and intent of this Agreement.

         18.9       Each of the parties hereby acknowledges that in entering
                    into this Agreement it has not relied on any representation
                    or warranty save as expressly set out herein or in any
                    document referred to herein.

         18.10      Nothing contained in this Agreement is intended or is to be
                    construed to constitute Elan and Emisphere as partners, or
                    Elan as an employee of Emisphere, or Emisphere as an
                    employee of Elan. Neither party hereto shall have any
                    express or implied right or authority to assume or create
                    any obligations on behalf of or in the name of the other
                    party or to bind the other party to any contract, agreement
                    or undertaking with any third party.

                                       21


IN WITNESS of which the parties have executed this Agreement.

                                       22


                                   SCHEDULE 1

                           PRODUCT MANUFACTURING COST

The following costs are manufacturing costs which are prepared by [* * *] in
accordance with generally accepted accounting principles consistently applied.

The following expenses are included in manufacturing costs:

1.       Direct Materials

Materials used in the manufacturing process that are traced directly to the
completed product and include:

         Inert raw materials or excipients

         Active substances/ingredients

         Packaging components such as bottles, caps, labels, etc.

2.       Direct Labour

The cost of employees engaged in production activities which are directly
identifiable with product costs. Direct Labour cost includes:

         Base pay, overtime, vacation and holidays, illness, personal with pay
         and shift differential.

         Cost of employee fringe benefits such as health and life insurance,
         payroll taxes, welfare, pension and profit sharing.

3.       Indirect Manufacturing Costs

Costs which are ultimately allocated to product based on standard labour hours
of the operating departments. These costs include:

         Costs of Direct Labour - employees not utilised for the manufacturing
         of product such as training, downtime and general duties.

         Indirect Materials - supplies and chemicals which are used in the
         manufacturing process and are not assigned to specific products but are
         included in manufacturing overhead costs. Includes supplies which are
         either common to several products or for which direct assignment to
         products is not practical.

                                       23


         Utilities - expenses incurred for fuel, electricity and water in
         providing power for production and other plant equipment.

         Maintenance and repairs - amount of expense incurred in-house or
         purchased to provide services for plant maintenance and repairs of
         facilities and equipment.

         Depreciation - of plant (being manufacturing and laboratory premises
         and buildings and the service, maintenance and renovation thereof) on
         the basis of a 20 year life and equipment (being handling, storage,
         manufacturing, processing and testing machinery and equipment) on the
         basis of a 7 to 10 year life utilising the straight-line method of
         calculation.

         Insurance - cost of comprehensive and other insurance necessary for the
         safeguard of manufacturing plant and equipment, and business
         interruption.

         Taxes - expense incurred for taxes on real and personal property
         (manufacturing site, buildings, and the fixed assets of equipment,
         furniture and fixtures, etc.). If manufacturing site includes other
         operations (marketing, research, etc.), taxes are allocated on the
         basis of total real and personal property.

4.       Quality Assurance Costs

         Direct labour and indirect costs for Quality Assurance departments
         testing and approving materials used in manufacturing and completed
         manufacturing batches and finished products. This includes all
         manufacturing in-process testing and testing of finished materials.
         Excluded from product costs are QA costs related to research and
         development testing and testing which is allocated back to appropriate
         manufacturing sites.

                                       24


SIGNED BY

/s/ Seamus Mulligan
- ----------------------------------
For and on behalf of
ELAN CORPORATION, PLC.
in the presence of:
- ----------------------------------

SIGNED BY

/s/ Charles Abdalian
- ----------------------------------
For and on behalf of
EMISPHERE TECHNOLOGIES, INC.
in the presence of:
- ----------------------------------

                                       25