CURON MEDICAL INC
S-1/A, EX-1.1, 2000-08-25
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                                                                     EXHIBIT 1.1


                              Curon Medical, Inc.

                               5,750,000 Shares

                                 Common Stock
                               ($.001 Par Value)

                            UNDERWRITING AGREEMENT


________ __, 2000
<PAGE>

                            UNDERWRITING AGREEMENT


                                                               ________ __, 2000

UBS Warburg LLC
CIBC World Markets Corp.
SG Cowen Securities Corporation
     As representatives of the several Underwriters
     named in Schedule A hereto
              ----------

c/o UBS Warburg LLC
299 Park Avenue
New York, New York  10171-0026

Ladies and Gentlemen:

          Curon Medical, Inc., a Delaware corporation (the "Company"), proposes
                                                            -------
to issue and sell to the Underwriters named in Schedule A annexed hereto (the
                                               ----------
"Underwriters") an aggregate of 5,750,000 shares (the "Firm Shares") of Common
 ------------                                          -----------
Stock, $.001 par value per share, of the Company (the "Common Stock").  In
                                                       ------------
addition, solely for the purpose of covering over-allotments, the Company
proposes to grant to the Underwriters the option to purchase from the Company up
to an additional 862,500 shares of Common Stock (the "Additional Shares").  The
                                                      -----------------
Firm Shares and the Additional Shares are hereinafter collectively sometimes
referred to as the "Shares".  The Shares are described in the Prospectus which
is referred to below.

          The Company hereby acknowledges that in connection with the proposed
offering of the Shares, it has requested UBS Warburg LLC ("UBSW") to administer
                                                           ----
a directed share program (the "Directed Share Program") under which up to
                               ----------------------
287,500 Firm Shares, or 5% of the Firm Shares, to be purchased by you (the
"Reserved Shares") shall be reserved for sale by you at the initial public
 ---------------
offering price to the Company's officers, directors, employees, and consultants
and others having a relationship with the Company (the "Directed Share
                                                        --------------
Participants") as part of the distribution of the Shares by the Underwriters,
------------
subject to the terms of this Agreement, the applicable rules, regulations and
interpretations of the National Association of Securities Dealers, Inc. ("NASD")
                                                                          ----
and all other applicable laws, rules and regulations. The number of Shares
available for sale to the general public will be reduced to the extent that
Directed Share Participants purchase Reserved Shares. You may offer any Reserved
Shares not purchased by Directed Share Participants to the general public on the
same basis as the other Shares being issued and sold hereunder.  The Company has
supplied UBSW with the names, addresses and telephone numbers of the individuals
or other entities which the Company has designated to be participants in the
Directed Share Program.  It is understood that any number of those designated to
participate in the Directed Share Program may decline to do so.

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          The Company has filed, in accordance with the provisions of the
Securities Act of 1933, as amended, and the rules and regulations thereunder
(collectively, the "Act"), with the Securities and Exchange Commission (the
                    ---
"Commission") a registration statement on Form S-1 (File No. 333-37866)
 ----------
including a prospectus, relating to the Shares.  The Company has furnished to
you, for use by the Underwriters and by dealers, copies of one or more
preliminary prospectuses (each thereof being herein called a "Preliminary
                                                              -----------
Prospectus") relating to the Shares.  Except where the context otherwise
----------
requires, the registration statement, as amended when it becomes effective,
including all documents filed as a part thereof, and including any information
contained in a prospectus subsequently filed with the Commission pursuant to
Rule 424(b) under the Act and deemed to be part of the registration statement at
the time of effectiveness pursuant to Rule 430(A) under the Act, and also
including any registration statement filed pursuant to Rule 462(b) under the Act
with respect to the offering contemplated by the Registration Statement, is
herein called the "Registration Statement", and the prospectus, in the form
                   -----------------------
filed by the Company with the Commission pursuant to Rule 424(b) under the Act
on or before the second business day after the date hereof (or such earlier time
as may be required under the Act) or, if no such filing is required, the form of
final prospectus included in the Registration Statement at the time the
Registration Statement became effective, is herein called the "Prospectus".
                                                               -----------

          The Company and the Underwriters agree as follows:

          1.  Sale and Purchase. Upon the basis of the representations and
              -----------------
warranties and subject to the terms and conditions herein set forth, the Company
agrees to sell to the respective Underwriters and each of the Underwriters,
severally and not jointly, agrees to purchase from the Company the aggregate
number of Firm Shares set forth opposite the name of such Underwriter in
Schedule A attached hereto, in each case at a purchase price of $____ per Share.
----------
The Company is advised by you that the Underwriters intend (i) to make a public
offering of their respective portions of the Firm Shares as soon after the
effective date of the Registration Statement as in your judgment is advisable
and (ii) initially to offer the Firm Shares upon the terms set forth in the
Prospectus. You may from time to time increase or decrease the public offering
price after the initial public offering to such extent as you may determine.

          In addition, upon the basis of the representations and warranties and
subject to the terms and conditions herein set forth, the Company hereby grants
to the several Underwriters the option to purchase, and, the Underwriters shall
have the right to purchase, severally and not jointly, from the Company, ratably
in accordance with the number of Firm Shares to be purchased by each of them,
all or a portion of the Additional Shares as may be necessary to cover over-
allotments made in connection with the offering of the Firm Shares, at the same
purchase price per share to be paid by the Underwriters to the Company for the
Firm Shares.  This option may be exercised by you on behalf of the several
Underwriters at any time and from time to time on or before the thirtieth day
following the date hereof, by written notice to the Company.  Such notice shall
set forth the aggregate number of Additional Shares as to which the option is
being exercised and the date and time when the Additional Shares are to be
delivered (such date and time being herein referred to as the "additional time
                                                               ---------------
of purchase"); provided, however, that the additional time of purchase shall not
-----------    --------  -------
be earlier than the time of purchase (as

                                       2
<PAGE>

defined below) nor earlier than the second business day after the date on which
the option shall have been exercised nor later than the tenth business day after
the date on which the option shall have been exercised. The number of Additional
Shares to be sold to each Underwriter shall be the number which bears the same
proportion to the aggregate number of Additional Shares being purchased as the
number of Firm Shares set forth opposite the name of such Underwriter on
Schedule A hereto bears to the total number of Firm Shares (subject, in each
----------
case, to such adjustment as you may determine to eliminate fractional shares).

          2.   Payment and Delivery. Payment of the purchase price for the Firm
               --------------------
Shares shall be made to the Company by Federal Funds wire transfer against
delivery of the certificates for the Firm Shares to you through the facilities
of the Depository Trust Company ("DTC") for the respective accounts of the
                                  ---
Underwriters. Such payment and delivery shall be made at 10:00 A.M., New York
City time, on _________ __, 2000 (unless another time shall be agreed to by you
and the Company or unless postponed in accordance with the provisions of Section
9 hereof). The time at which such payment and delivery are actually made is
hereinafter sometimes called the "time of purchase". Certificates for the Firm
                                  ----------------
Shares shall be delivered to you in definitive form in such names and in such
denominations as you shall specify on the second business day preceding the time
of purchase. For the purpose of expediting the checking of the certificates for
the Firm Shares by you, the Company agrees to make such certificates available
to you for such purpose at least one full business day preceding the time of
purchase.

          Payment of the purchase price for the Additional Shares shall be made
at the additional time of purchase in the same manner and at the same office as
the payment for the Firm Shares.  Certificates for the Additional Shares shall
be delivered to you in definitive form in such names and in such denominations
as you shall specify no later than the second business day preceding the
additional time of purchase.  For the purpose of expediting the checking of the
certificates for the Additional Shares by you, the Company agrees to make such
certificates available to you for such purpose at least one full business day
preceding the additional time of purchase.

          Deliveries of the documents described in Section 7 below with respect
to the purchase of the Shares shall be made at the offices of Dewey Ballantine
LLP, 1301 Avenue of the Americas, New York, New York at 9:00 a.m., New York
time, on the date of the closing of the purchase of the Firm Shares or the
Additional Shares, as the case may be.

          3.   Representations and Warranties of the Company. The Company
               ---------------------------------------------
represents and warrants to each of the Underwriters that:

          (a)  The Company has not received, and has no notice of, any order of
     the Commission preventing or suspending the use of any Preliminary
     Prospectus, or instituting proceedings for that purpose, and each
     Preliminary Prospectus, at the time of filing thereof, conformed in all
     material respects to the requirements of the Act. When the Registration
     Statement became or becomes effective, the Registration Statement and the
     Prospectus complied or will comply in all material respects with the
     provisions of the

_________________________
          /1/     As used herein "business day" shall mean a day on which the
New York Stock Exchange is open for trading.

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<PAGE>

     Act, and the Registration Statement did not or will not contain an untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein not
     misleading, and the Prospectus did not or will not contain an untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein, in light of
     the circumstances under which they were made, not misleading and the
     Prospectus, any Preliminary Prospectus and any supplement thereto or
     prospectus wrapper prepared in connection therewith, at their respective
     times of issuance and at the time of closing, complied and will comply in
     all material respects with any applicable laws or regulations of
     jurisdictions in which the Prospectus and such preliminary prospectus, as
     amended or supplemented, if applicable, are distributed in connection with
     the offer and sale of the Shares, provided, however, that the Company makes
                                       --------  -------
     no representation or warranty with respect to any statement contained in
     the Registration Statement or the Prospectus in reliance upon and in
     conformity with information concerning the Underwriters and furnished in
     writing by or on behalf of any Underwriter through you to the Company
     expressly for use in the Registration Statement or the Prospectus. The
     Company has not distributed directly or indirectly any offering material in
     connection with the offering or sale of the Shares other than the
     Registration Statement, the Preliminary Prospectus, the Prospectus or any
     other materials, if any, permitted by the Act.

          (b)  As of the date of this Agreement, the Company has an authorized
     and outstanding capital stock as set forth under the heading entitled
     "Actual" in the section of the Registration Statement and the Prospectus
     entitled "Capitalization" and, as of the time of purchase, and assuming the
     receipt and application of the net proceeds as described under the section
     of the Registration Statement and the Prospectus entitled "Use of
     Proceeds," the Company shall have an authorized and outstanding capital
     stock as set forth under the heading entitled "Pro Forma As Adjusted" in
     the section of the Registration Statement and the Prospectus entitled
     "Capitalization." All of the outstanding shares of capital stock have been
     duly and validly authorized and issued and are fully paid and non-
     assessable, have been issued in material compliance with all federal and
     state securities laws and have not have been issued in violation of any
     preemptive right, resale right, right of first refusal or similar right.

          (c)  The Company has been duly organized and is validly existing as a
     corporation and is in good standing under the laws of the State of
     Delaware, with full power and authority to own, lease and operate its
     properties and conduct its business as described in the Registration
     Statement;

          (d)  The Company is duly qualified to do business as a foreign
     corporation and is in good standing in each jurisdiction in which the
     ownership or leasing of its properties or the conduct of its business
     requires such qualification, except where the failure to so qualify in any
     such jurisdiction would not individually or in the aggregate have a
     material adverse effect on the business, prospects, properties, financial
     condition or results of operation of the Company and the Subsidiary (as
     defined herein), taken as a whole (a "Material Adverse Effect"). The
                                           -----------------------
     Company does not have any subsidiaries (as defined in the Act) other than
     Conway Stuart Medical Pty Limited (the "Subsidiary"). The Company owns 100%
                                             ----------
     of the outstanding capital stock of the Subsidiary. Other than the

                                       4
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     Subsidiary, the Company does not own, directly or indirectly, any shares of
     stock or any other equity or long-term debt securities of any corporation
     or have any equity interest in any firm, partnership, limited liability
     company, joint venture, association or other entity except as contemplated
     by the Prospectus and set forth in the Registration Statement and the
     Prospectus. Complete and correct copies of the certificate of incorporation
     and bylaws or other organizational documents of the Company and all
     amendments thereto have been delivered to you, and except as described in
     the Prospectus and set forth in the exhibits to the Registration Statement,
     no changes therein will be made subsequent to the date hereof and prior to
     the time of purchase or, if later, the additional time of purchase. The
     Subsidiary has not and is not engaged in any business activities or
     operations and has not had and does not have any material assets or
     liabilities. All of the outstanding capital stock of the Subsidiary has
     been duly authorized and validly issued, is fully paid and non-assessable
     and is owned by the Company subject to no security interest, other
     encumbrance or adverse claims.

          (e)  The Company is not in violation of any law, ordinance,
     administrative or governmental rule or regulation applicable to it or of
     any decree of any court or governmental agency or body having jurisdiction
     over it, which violation could, individually or in the aggregate, have a
     Material Adverse Effect.

          (f)  The Company is not in breach of, or in default under (and no
     event has occurred which with notice, lapse of time, or both would result
     in any breach of, or constitute a default under), its charter or by-laws or
     other organizational documents or in the performance or observance of any
     obligation, agreement, covenant or condition contained in any indenture,
     mortgage, deed of trust, bank loan or credit agreement or other evidence of
     indebtedness, or any lease, contract or other agreement or instrument to
     which the Company is a party or by which the Company or any of its
     properties is bound, the effect of which would individually or in the
     aggregate have a Material Adverse Effect. The execution, delivery and
     performance of this Agreement and the issuance and sale of the Shares
     contemplated hereby and by the Registration Statement will not conflict
     with, or result in any breach of or constitute a default under (nor
     constitute any event which with notice, lapse of time, or both would result
     in any breach of, or constitute a default under), any provisions of the
     charter or by-laws or other organizational documents of the Company or
     under any provision of any license, permit, franchise, indenture, mortgage,
     deed of trust, bank loan or credit agreement or other evidence of
     indebtedness, or any lease, contract or other agreement or instrument to
     which the Company is a party or by which the Company or its properties may
     be bound, or under any federal, state, local or foreign law, regulation or
     rule or any decree, judgment or order applicable to it, the result of which
     would individually or in the aggregate have a Material Adverse Effect.

          (g)  This Agreement has been duly authorized, executed and delivered
     by the Company and is a legal, valid and binding agreement of the Company,
     enforceable against the Company in accordance with its terms.

          (h)  The capital stock of the Company, including the Shares, conforms
     in all material respects to the description thereof contained in the
     Registration Statement and

                                       5
<PAGE>

     Prospectus. The certificates for the Shares are in due and proper form and
     conform in all material respects to the requirements of the Delaware
     General Corporation Law. The holders of the Shares will not be subject to
     personal liability by reason of being such holders.

          (i)  The Shares have been duly and validly authorized and, when issued
     and delivered against payment therefor as provided herein, will be duly and
     validly issued, fully paid and non-assessable.

          (j)  No approval, authorization, consent or order of or filing with
     any national, state or local governmental or regulatory commission, board,
     body, authority or agency is required in connection with the execution,
     delivery and performance by the Company of this Agreement, the issuance and
     sale of the Shares contemplated hereby and by the Registration Statement,
     other than registration of the Shares under the Act, which has been or will
     be effected by the Company, and any necessary qualification under the
     securities or blue sky laws of the various jurisdictions in which the
     Shares are being offered by the Underwriters or under the rules and
     regulations of the NASD.

          (k)  Except as set forth in the Registration Statement and the
     Prospectus: no person has, either contractual or pursuant to the
     organizational documents of the Company, (i) the right to cause the Company
     to register pursuant to the Act, any shares of capital stock or other
     equity interests; and (ii) preemptive rights, co-sale rights, rights of
     first refusal or other rights to purchase any shares of Common Stock. No
     person has the right, either contractual or pursuant to the organizational
     documents of the Company, to cause the Company to register under the Act
     any shares of capital stock or other equity interests as a result of the
     filing or effectiveness of the Registration Statement or the sale of the
     Shares as contemplated thereby.

          (l)  PricewaterhouseCoopers LLP, whose report on the financial
     statements of the Company are filed with the Commission as part of the
     Registration Statement and Prospectus, are independent public accountants
     as required by the Act.

          (m)  The Company has all necessary licenses, permits, franchises,
     authorizations, consents and approvals, and made all necessary filings
     required under any federal, state, local or foreign law, regulation or
     rule, and has obtained, other than as would not have, individually or in
     the aggregate, a Material Adverse Effect, all authorizations, consents and
     approvals from other persons, in order to conduct its business; and the
     Company is not in violation of, or in default under, any such license,
     permit, franchise, authorization, consent or approval, the effect of which
     could individually or in the aggregate have a Material Adverse Effect.

          (n)  All legal or governmental proceedings, all statutes and
     regulations and all contracts, leases or documents of a character required
     to be described in the Registration Statement or the Prospectus or to be
     filed as an exhibit to the Registration Statement have been so described or
     filed as required.

                                       6
<PAGE>

          (o)  There are no private or governmental actions, suits, claims,
     investigations or proceedings pending, or, to the knowledge of the Company,
     threatened or contemplated, to which the Company or any of its officers is
     subject or of which any of its properties is subject, whether at law, in
     equity or before or by any federal, state, local or foreign governmental or
     regulatory commission, board, body, authority or agency, and which would
     have a Material Adverse Effect, either individually or in the aggregate.

          (p)  The audited financial statements of the Company included in the
     Registration Statement and the Prospectus present fairly the financial
     position and results of operations of the Company as of the dates and for
     the periods indicated; such financial statements have been prepared in
     conformity with generally accepted accounting principles applied on a
     consistent basis during the periods involved; the pro forma financial data
     included in the Registration Statement and the Prospectus comply as to form
     in all material respects with the applicable accounting requirements of
     Regulation S-X of the Securities Act, and the pro forma adjustments have
     been properly applied to the historical amounts in the compilation of those
     statements; and the other financial and statistical data set forth in the
     Registration Statement and the Prospectus are accurately presented and
     prepared on a basis consistent with such financial statements and the books
     and records of the Company.

          (q)  Subsequent to the respective dates as of which information is
     given in the Registration Statement and the Prospectus, there has not been
     (i) any event that has had a Material Adverse Effect, or any event that
     would have a Material Adverse Effect, (ii) any transaction which is
     material to the Company, (iii) the incurrence by the Company of any
     obligation, direct or contingent, and whether or not in the ordinary course
     of business, which is material to the Company, (iv) any material change in
     the capital stock or other equity interest or outstanding indebtedness of
     the Company, or (v) any dividend or distribution of any kind declared, paid
     or made on the capital stock or other equity interest of the Company. The
     Company does not have any contingent obligations which are material to it
     and are not disclosed in the Registration Statement.

          (r)  The Company has obtained for the benefit of the Underwriters the
     agreement (a "Lock-Up Agreement") of each of its officers and directors and
     the holders of Common Stock and securities convertible into or exchangeable
     or exercisable for Common Stock (including options and warrants) relating
     to, in the aggregate, __% of the Company's outstanding Common Stock on a
     fully diluted basis and pursuant to which each such officer, director and
     holder has agreed not to sell, offer to sell, contract to sell,
     hypothecate, pledge, grant any option to sell or otherwise dispose of,
     directly or indirectly, any shares of Common Stock or securities
     convertible into or exchangeable or exercisable for Common Stock for a
     period of one hundred and eighty (180) days after the date of the
     Prospectus without the prior written consent of UBSW.

          (s)  The Company has good and marketable title to all property (real
     and personal) described in the Prospectus as being owned by it, free and
     clear of all liens, claims, security interests or other encumbrances except
     such as are described in the Registration Statement and the Prospectus or
     except as would not individually or in the aggregate have a Material
     Adverse Effect. To the Company's knowledge, all the property

                                       7
<PAGE>

     being held under lease by the Company is held thereby under valid,
     subsisting and enforceable leases.

          (t)  The Company is insured by insurers of recognized financial
     responsibility against such losses and risks and in such amount as are
     customary in the business in which it is engaged. All policies of insurance
     insuring the Company or any of its businesses, assets, employees, officers
     and directors are in full force and effect, and the Company is in
     compliance with the terms of such policies in all material respects. There
     are no claims by the Company under any such policy or instrument as to
     which any insurance company is denying liability or defending under a
     reservation of rights clause.

          (u)  The Company has not either sent or received any notice of
     termination of any of the contracts or agreements referred to or described
     in, or filed as an exhibit to, the Registration Statement, and no such
     termination has been threatened by the Company or, to the Company's
     knowledge, by any other party to any such contract or agreement.

          (v)  All statistical and market-related data included in the
     Prospectus are based on or derived from sources that the Company believes
     to be reliable and accurate, and the Company has obtained the written
     consent to the use of such data from such sources to the extent required.

          (w)  Neither the Company nor any of its affiliates has taken, directly
     or indirectly, any action designed to or which has constituted or which
     might reasonably be expected to cause or result, under the Securities
     Exchange Act of 1934, as amended, and the rules and regulations thereunder
     (collectively, the "Exchange Act") or otherwise, in stabilization or
                         ------------
     manipulation of the price of any security of the Company to facilitate the
     sale or resale of the Shares.

          (x)  The Company owns or has obtained licenses (which such licenses
     are enforceable against the Company and, to the Company's knowledge, the
     other parties thereto) for the patents, patent applications, inventions,
     technology, trademarks, trademark registrations, service marks, service
     mark registrations, trade names, copyrights, trade secrets and rights
     described in the Prospectus as being owned or used by or licensed to it or
     necessary for the conduct of its business as described in the Prospectus
     (collectively, the "Intellectual Property"). Except as set forth in the
     Prospectus and except as would not have a Material Adverse Effect, (i) to
     the Company's knowledge, there are no rights of third parties to any such
     Intellectual Property; (ii) to the Company's knowledge there is no
     infringement by third parties of any such Intellectual Property; (iii)
     there is no pending or, to the Company's knowledge, threatened action,
     suit, proceeding or claim by others challenging the Company's rights in or
     to any such Intellectual Property, and the Company is unaware of any facts
     which would form a reasonable basis for any such claim; (iv) there is no
     pending or, to the Company's knowledge, threatened action, suit, proceeding
     or claim by others challenging the validity or scope of any such
     Intellectual Property, and the Company is unaware of any facts which would
     form a reasonable basis for any such claim; (v) there is no pending or, to
     the Company's knowledge, threatened action, suit, proceeding or claim by
     others that the Company infringes or otherwise violates, or would infringe
     or otherwise violate upon commercialization of its products and product
     candidates described in the

                                       8
<PAGE>

     Prospectus, any patent, trademark, copyright, trade secret or other
     proprietary rights of others, and the Company is unaware of any facts which
     would form a reasonable basis for any such claim; (vi) to the Company's
     knowledge, there is no patent or patent application which contains claims
     that dominate or may dominate any Intellectual Property described in the
     Prospectus as being owned by or licensed to the Company or that is
     necessary for the conduct of their respective businesses as currently or
     contemplated to be conducted and described in the Prospectus or that
     interferes with the issued or pending claims of any such Intellectual
     Property; and (vii) there is no prior art of which the Company is aware
     that may render any patent held by the Company invalid or any patent
     application held by the Company unpatentable which has not been disclosed
     to the U.S. Patent and Trademark Office. The commercial products and
     product candidates of the Company described in the Prospectus read on the
     claims contained in the patents and patent applications described in the
     Prospectus.

          (y)  The Company has not sustained since the date of the latest
     audited financial statements included in the Prospectus any loss or
     interference with its business from fire, explosion, flood or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     court or governmental action, order or decree, otherwise than as disclosed
     in the Prospectus or other than any loss or interference which individually
     or in the aggregate would not have a Material Adverse Effect.

          (z)  The Company has not violated any foreign, federal, state or local
     law or regulation relating to the protection of human health and safety,
     the environment or hazardous or toxic substances or wastes, pollutants or
     contaminants, nor any federal or state law relating to discrimination in
     the hiring, promotion or pay of employees nor any applicable federal or
     state wages and hours laws, nor any provisions of the Employee Retirement
     Income Security Act or the rules and regulations promulgated thereunder,
     which individually or in the aggregate would result in a Material Adverse
     Effect.

          (aa) The Company maintains a system of internal accounting controls
     sufficient to provide reasonable assurances that (i) transactions are
     executed in accordance with management's general or specific authorization;
     (ii) transactions are recorded as necessary to permit preparation of
     financial statements in conformity with generally accepted accounting
     principles and to maintain accountability for assets; (iii) access to
     assets is permitted only in accordance with management's general or
     specific authorization; and (iv) the recorded accountability for assets is
     compared with existing assets at reasonable intervals and appropriate
     action is taken with respect to any differences.

          (bb) Each of the Company and the Subsidiary has filed all federal,
     state, local and foreign tax returns and tax forms required to be filed.
     Such returns and forms are complete and correct in all material respects,
     and all taxes shown by such returns or otherwise assessed that are due or
     payable have been paid, except such taxes as are being contested in good
     faith and as to which adequate reserves have been provided. All payroll
     withholdings required to be made by the Company with respect to employees
     have been made. The charges, accruals and reserves on the books of the
     Company in respect of any tax liability for any year not finally determined
     are adequate to meet any assessments or reassessments for additional taxes.
     There have been no tax deficiencies asserted and, to the

                                       9
<PAGE>

     knowledge of the Company, no tax deficiency might be reasonably asserted or
     threatened against the Company or the Subsidiary that could individually or
     in the aggregate have a Material Adverse Effect.

          (cc) The clinical, pre-clinical and other studies and tests conducted
     by or on behalf of or sponsored by the Company or in which the Company or
     its products or product candidates have participated that are described in
     the Prospectus or the results of which are referred to in the Prospectus
     were and, if still pending, are being conducted in accordance with standard
     medical and scientific research procedures. The descriptions in the
     Prospectus of the results of such studies and tests are accurate and
     complete in all material respects and fairly present the data derived from
     such studies and tests, and the Company has no knowledge of any other
     studies or tests the results of which are inconsistent with or otherwise
     call into question the results described or referred to in the Prospectus.
     Except to the extent disclosed in the Registration Statement and the
     Prospectus, the Company has operated and currently is in compliance in all
     material respects with all applicable United States Food and Drug
     Administration ("FDA") rules, regulations and policies. Except to the
                      ---
     extent disclosed in the Registration Statement and the Prospectus, the
     Company has not received any notices or other correspondence from the FDA
     or any other governmental agency requiring the termination, suspension or
     modification of any clinical or pre-clinical studies or tests that are
     described in the Prospectus or the results of which are referred to in the
     Prospectus.

          (dd) Immediately after the issuance and sale of the Shares to the
     Underwriters, no shares of preferred stock of the Company shall be issued
     and outstanding, and no holder of any shares of capital stock, securities
     convertible into or exchangeable or exercisable for capital stock or
     options, warrants or other rights to purchase capital stock or any other
     securities of the Company shall have any existing or future right to
     acquire any shares of preferred stock of the Company.

          (ee) The Company is not, and after the offering and sale of the
     Shares, will not be, an "investment company" or a "promoter" or a
     "principal underwriter" for or an entity "controlled" by an "investment
     company," as such terms are defined in the Investment Company Act of 1940,
     as amended (the "Investment Company Act").
                      ----------------------

          In addition, any certificate signed by any officer of the Company and
delivered to the Representatives or counsel for the Underwriters in connection
with the offering of the Shares shall be deemed to be a representation and
warranty by the Company, as to matters covered thereby, to each Underwriter.

                                      10


<PAGE>

          4.   Representations and Warranties of the Underwriters. You, on
               --------------------------------------------------
behalf of the several Underwriters, represent and warrant to the Company that
the information provided by you and set forth in the fifth, sixth, eighth,
ninth, tenth, eleventh and twelfth paragraphs under the caption "Underwriting"
in the Prospectus constitute the only information provided by or on behalf of
the Underwriters through you for use in the Registration Statement and the
Prospectus. You represent and warrant that you have been authorized by each of
the other Underwriters to enter into this Agreement on behalf of each of the
other Underwriters and to act for each of them in the manner herein provided.

          5.   Certain Covenants. The Company hereby agrees:
               -----------------

          (a)  to furnish such information as may be reasonably required and
     otherwise to reasonably cooperate in qualifying the Shares for offering and
     sale under the securities or blue sky laws of such states as you may
     designate and to maintain such qualifications in effect so long as required
     for the distribution of the Shares; provided, however, that the Company
                                         --------  -------
     shall not be required to register or qualify as a foreign corporation or to
     take any action which would subject it to the service of process in suits,
     other than as to matters and transactions relating to the offer and sale of
     the Shares, in any jurisdiction where it is not now so subject; and to
     promptly advise you of the receipt of any notification with respect to the
     suspension of the qualification of the Shares for sale in any jurisdiction
     or the initiation or threatening of any proceeding for such purpose;

          (b)  to make available to the Underwriters in New York City, as soon
     as reasonably practicable after the Registration Statement becomes
     effective, and thereafter from time to time to furnish to the Underwriters,
     as many copies of the Prospectus (or of the Prospectus as amended or
     supplemented if the Company shall have made any amendments or supplements
     thereto after the effective date of the Registration Statement) as the
     Underwriters may reasonably request for the purposes contemplated by the
     Act; in case any Underwriter is required to deliver a prospectus beyond the
     nine-month period referred to in Section 10(a)(3) of the Act in connection
     with the sale of the Shares, the Company will prepare promptly upon
     request, but at the cost of the Underwriters, such amendment or amendments
     to the Registration Statement and such prospectuses as may be necessary to
     permit compliance with the requirements of Section 10(a)(3) of the Act;

          (c)  to advise you promptly and (if requested by you) to confirm such
     advice in writing, (i) when the Registration Statement has become effective
     and when any post-effective amendment thereto becomes effective and (ii) if
     Rule 430A under the Act is used, when the Prospectus is filed with the
     Commission pursuant to Rule 424(b) under the Act (which the Company agrees
     to file in a timely manner under such Rules);

          (d)  to advise you promptly, and to confirm such advice in writing, of
     any request by the Commission for amendments or supplements to the
     Registration Statement or Prospectus or for additional information with
     respect thereto, or of notice of institution of proceedings for, or the
     entry of a stop order suspending the effectiveness of the Registration
     Statement and, if the Commission should enter a stop order suspending the
     effectiveness of the Registration Statement, to use its best commercial
     efforts to obtain the lifting or removal of such order as soon as possible;
     to advise you promptly of any

                                       11
<PAGE>

     proposal to amend or supplement the Registration Statement or Prospectus
     and to file no such amendment or supplement to which you shall reasonably
     object in writing;

          (e)  subject to Section 5(o) hereof, to file promptly all reports and
     any definitive proxy or information statement required to be filed by the
     Company with the Commission in order to comply with the Exchange Act
     subsequent to the date of the Prospectus and for so long as the delivery of
     a prospectus is required in connection with the offering or sale of the
     shares, and to promptly notify you of such filing;

          (f)  if necessary or appropriate, to file in a timely fashion a
     registration statement pursuant to Rule 462(b) under the Act;

          (g)  to furnish to you and, upon request, to each of the other
     Underwriters for a period of three years from the date of this Agreement
     (i) copies of any reports or other communications which the Company shall
     send to its stockholders or shall from time to time publish or publicly
     disseminate and (ii) such other information as you may reasonably request
     regarding the Company or the Subsidiary as soon as such communications,
     documents or information becomes available;

          (h)  to advise the Underwriters promptly of the occurrence of any
     event known to the Company within the time during which a Prospectus
     relating to the Shares is required to be delivered under the Act which
     would require the making of any change in the Prospectus then being used so
     that the Prospectus would not include an untrue statement of a material
     fact or omit to state a material fact necessary to make the statements
     therein, in the light of the circumstances under which they are made, not
     misleading, and, during such time, to prepare, file (subject to Section
     5(d) hereof) and furnish promptly to the Underwriters, at the Company's
     expense, such amendments or supplements to such Prospectus as may be
     necessary to reflect any such change and to furnish you a copy of such
     proposed amendment or supplement before filing any such amendment or
     supplement with the Commission;

          (i)  to make generally available to its security holders, and to
     deliver to you, as soon as reasonably practicable an earnings statement of
     the Company (which will satisfy the provisions of Section 11(a) of the Act)
     covering a period of twelve months beginning after the effective date of
     the Registration Statement (as defined in Rule 158(c) of the Act) and
     ending not later than fifteen (15) months thereafter;

          (j)  to furnish to its stockholders as soon as reasonably practicable
     after the end of each fiscal year an annual report (including a balance
     sheet and statements of income, stockholders' equity and of cash flow of
     the Company for such fiscal year, accompanied by a copy of the certificate
     or report thereon of nationally recognized independent certified public
     accountants);

          (k)  to furnish to you such number of conformed copies of the
     Registration Statement, as initially filed with the Commission, and of all
     amendments thereto (including all exhibits thereto) as you shall reasonably
     request;

                                       12
<PAGE>

          (l)  to furnish to you as early as practicable prior to the time of
     purchase and the additional time of purchase, as the case may be, but not
     later than two (2) business days prior thereto, a copy of the latest
     available quarterly (if available) or monthly unaudited interim financial
     statements, if any, of the Company which have been read by the Company's
     independent certified public accountants, as stated in their letter to be
     furnished pursuant to Section 7(e) hereof;

          (m)  to apply the net proceeds from the sale of the Shares in the
     manner set forth under the caption "Use of Proceeds" in the Prospectus;

          (n)  to pay all costs, expenses, fees and taxes in connection with (i)
     the preparation and filing of the Registration Statement, each Preliminary
     Prospectus, the Prospectus, and any amendments or supplements thereto, and
     the printing and furnishing of copies of each thereof to the Underwriters
     and to dealers (including costs of mailing and shipment), (ii) the
     registration, issue, sale and delivery of the Shares, (iii) the producing,
     word processing and/or printing of this Agreement, any agreement among
     Underwriters, any dealer agreements, any powers of attorney and any closing
     documents (including compilations thereof) and the reproduction and/or
     printing and furnishing of copies of each thereof to the Underwriters and
     (except closing documents) to dealers (including costs of mailing and
     shipment), (iv) the qualification of the Shares for offering and sale under
     state laws and the determination of their eligibility for investment under
     state law as aforesaid (including the reasonable legal fees and filing fees
     and other disbursements of counsel for the Underwriters) and the printing
     and furnishing of copies of any blue sky surveys or legal investment
     surveys to the Underwriters and to dealers, (v) any listing of the Shares
     on any securities exchange or qualification of the Shares for quotation on
     the National Association of Securities Dealers Automated Quotation National
     Market System ("NASDAQ") and any registration thereof under the Exchange
                     ------
     Act, (vi) the review of the public offering of the Shares by the NASD,
     including the associated filing fees and the reasonable fees and
     disbursements of counsel for the Underwriters, and (vii) the performance of
     the Company's other obligations hereunder; provided that, except as
                                                -------------
     specifically set forth in this Agreement, the Underwriters shall pay all of
     their own expenses, including the fees and disbursements of their counsel.

          (o) to furnish to you, before filing with the Commission subsequent to
     the effective date of the Registration Statement and during the period
     referred to in paragraph (h) above, a copy of any document proposed to be
     filed pursuant to Section 13, 14 or 15(d) of the Exchange Act;

          (p) not to sell, offer to sell, contract to sell, hypothecate, pledge,
     grant any option to sell or otherwise dispose of, directly or indirectly,
     any shares of Common Stock or securities convertible into or exchangeable
     or exercisable for Common Stock or options, warrants or other rights to
     purchase Common Stock or any other shares of the Company that are
     substantially similar to Common Stock or file a registration statement
     under the Act relating to the offer and sale of any shares of Common Stock
     or securities convertible into or exchangeable or exercisable for Common
     Stock or options, warrants or other rights to purchase Common Stock or any
     other shares of the Company that are substantially similar to Common Stock
     for a period of one hundred and eighty (180) days

                                       13
<PAGE>

     after the date hereof (the "Lock-up Period"), without the prior written
                                 --------------
     consent of UBSW, except for (i) the registration of the Shares and the
     sales to the Underwriters pursuant to this Agreement, (ii) issuances of
     Common Stock upon the exercise of outstanding options or warrants as
     disclosed in the Registration Statement and the Prospectus to persons who
     have entered into Lock-Up Agreements with the Underwriters and (iii) the
     issuance of employee stock options not exercisable during the Lock-up
     Period pursuant to stock option plans described in the Registration
     Statement and the Prospectus; and

          (q)  to use its best efforts to cause the Common Stock to be listed
     for quotation on the NASDAQ.

          6.   Reimbursement of Underwriters' Expenses.  The Company agrees that
               ---------------------------------------
if the Shares are not delivered for any reason other than the termination of
this Agreement pursuant to subsections (ii), (iii) or (iv) of the second
paragraph of Section 8 hereof or the last paragraph of Section 9 hereof or the
default by one or more of the Underwriters in its or their respective
obligations hereunder, the Company shall, in addition to paying the amounts
described in Section 5(n) hereof, reimburse the Underwriters for all of the out-
of-pocket accountable expenses actually and reasonably incurred by the
Underwriters, including the reasonable fees and disbursements of their counsel.

          7.   Conditions of Underwriters' Obligations.  The several obligations
               ---------------------------------------
of the Underwriters hereunder are subject to the accuracy of the representations
and warranties of the Company on the date hereof and at the time of purchase as
if made at the time of purchase (and the several obligations of the Underwriters
at the additional time of purchase are subject to the accuracy of the
representations and warranties of the Company on the date hereof and at the time
of purchase (unless previously waived) and at the additional time of purchase,
as the case may be, as if made at such time), the timely performance by the
Company of its obligations hereunder and to the following additional conditions
precedent:

          (a)  The Company shall furnish to you at the time of purchase and at
     the additional time of purchase, as the case may be, an opinion of Wilson
     Sonsini Goodrich & Rosati, counsel for the Company, addressed to the
     Underwriters, and dated the time of purchase or the additional time of
     purchase, as the case may be, with reproduced copies for each of the other
     Underwriters and in form reasonably satisfactory to Dewey Ballantine LLP,
     counsel for the Underwriters, stating that:

               (i)  the Company has been duly incorporated and is validly
          existing as a corporation and is in good standing under the laws of
          the State of Delaware, with full corporate power and authority to own,
          lease and operate its properties and conduct its business as described
          in the Registration Statement and the Prospectus, to execute and
          deliver this Agreement and to issue, sell and deliver the Shares as
          herein contemplated;

               (ii) the Company is duly qualified to do business as a foreign
          corporation and is in good standing in each jurisdiction in which the
          ownership or leasing of its properties or the conduct of its business
          requires such qualification,

                                       14
<PAGE>

          except where the failure to so qualify would not individually or in
          the aggregate have a Material Adverse Effect;

               (iii)  this Agreement has been duly authorized, executed and
          delivered by the Company;

               (iv)   the Shares have been duly authorized and, when issued and
          delivered to and paid for by the Underwriters, will be validly issued,
          fully paid and non-assessable;

               (v)    the Company has authorized and outstanding shares of
          capital stock as set forth in the Registration Statement and the
          Prospectus; the outstanding shares of capital stock of the Company
          have been duly and validly authorized and issued and are fully paid,
          nonassessable and have not been issued in violation of or subject to
          any preemptive rights or other rights to subscribe for or purchase
          securities arising (i) by operation of the charter or by-laws of the
          Company or the General Corporation Law of the State of Delaware or
          (ii) to our knowledge, under any agreement to which the Company is a
          party. The certificates evidencing the Shares to be delivered
          hereunder are in due and proper form under Delaware law, and when duly
          countersigned by the Company's transfer agent and registrar, and
          delivered to you or upon your order against payment of the agreed
          consideration therefor in accordance with the provisions of this
          Agreement, the Shares represented thereby will be duly authorized and
          validly issued, fully paid and nonassessable, will not have been
          issued in violation of or subject to any preemptive rights or other
          rights to subscribe for or purchase securities arising (i) by
          operation of the charter or by-laws of the Company or the General
          Corporation Law of the State of Delaware or (ii) to our knowledge,
          under any agreement to which the Company is a party, and the holders
          of the Shares will not be subject to personal liability by reason of
          being such holders;

               (vi)   all of the outstanding shares of capital stock of the
          Subsidiary have been duly authorized and validly issued, are fully
          paid and non-assessable, are owned by the Company and are not subject
          to any perfected security interest or, to such counsel's knowledge,
          any other encumbrance or adverse claim;

               (vii)  the capital stock of the Company, including the Shares,
          conforms in all material respects to the description thereof contained
          in the Prospectus;

               (viii) the Registration Statement and the Prospectus (except as
          to the financial statements and schedules and other financial and
          statistical data derived therefrom or contained therein, as to which
          such counsel need express no opinion) comply as to form in all
          material respects with the requirements of the Act;

               (ix)   the Registration Statement has become effective under the
          Act and, to such counsel's knowledge, no stop order proceedings with
          respect thereto are pending or threatened under the Act and any
          required filing of the Prospectus, and

                                       15
<PAGE>

          any supplement thereto pursuant to Rule 424 under the Act has been
          made in the manner and within the time period required by such Rule
          424;

               (x)    no approval, authorization, consent or order of or filing
          with any national, state or local governmental or regulatory
          commission, board, body, authority or agency is legally required in
          connection with the execution and delivery of this Agreement, the
          issuance and sale of the Shares and the consummation of the
          transactions contemplated hereby and by the Registration Statement,
          other than those that have been obtained under the Act, the Exchange
          Act, or from the NASD and other than any necessary qualification under
          the state securities or blue sky laws of the various jurisdictions in
          which the Shares are being offered by the Underwriters, as to which
          such qualification such counsel need express no opinion;

               (xi)   the execution, delivery and performance of this Agreement
          by the Company and the transactions contemplated hereby and by the
          Registration Statement do not and will not result in any material
          breach of, or constitute a material default under (nor constitute any
          event which with notice, lapse of time, or both, would result in such
          a breach of, or default under) (A) any provisions of the charter or
          by-laws or other organizational documents of the Company, (B) any
          provision of any license, permit, franchise, indenture, mortgage, deed
          of trust, bank loan or credit agreement or other evidence of
          indebtedness, or any lease, contract or other agreement or instrument
          that is described in or filed as an exhibit to the Registration
          Statement or (C) any federal, state or local law, regulation or rule
          (except to the extent any such law, regulation or rule concerns patent
          or FDA regulatory matters, as to which such counsel need express no
          opinion), or any decree, judgment or order pursuant to which the
          Company is legally bound and which is known to us;

               (xii)  to such counsel's knowledge, there are no contracts,
          licenses, agreements, leases or documents of a character which are
          required to be filed as exhibits to the Registration Statement or to
          be described in the Prospectus which have not been so filed or
          described;

               (xiii) to such counsel's knowledge, there are no private or
          governmental actions, suits, claims, investigations or proceedings
          pending, threatened or contemplated to which the Company or any of its
          officers is subject or of which any of its properties is subject,
          which are required to be described in the Prospectus, which are not
          described as required;

               (xiv)  the Company is not, and after the offering and sale of the
          Shares, will not be, an "investment company," or a "promoter,"
          "principal underwriter" for or an entity controlled by an "investment
          company," as such terms are defined in the Investment Company Act,
          assuming that, pending their uses identified in the Prospectus, the
          net proceeds of the offering contemplated by the Prospectus will be
          invested in "government securities" within the meaning of the
          Investment Company Act;

                                       16
<PAGE>

               (xv)   except as to regulatory and patent matters, as to which
          such counsel need express no opinion, the statements in the
          Registration Statement and Prospectus, insofar as they are
          descriptions of contracts, agreements or other legal documents, or
          refer to statements of law or legal conclusions, are accurate in all
          material respects and present fairly the information required to be
          shown;

               (xvi)  immediately after the issuance and sale of the Shares to
         the Underwriters, no holder of any shares of capital stock or other
         securities (including options and warrants) of the Company described in
         the Registration Statement shall have any right to acquire any shares
         of preferred stock of the Company; and

               (xvii) no person has the right, pursuant to the terms of any
          contract, agreement or other instrument described in or filed as an
          exhibit to the Registrations Statement, to cause the Company to
          register under the Act any shares of capital stock or other securities
          as a result of the filing or effectiveness of the Registration
          Statement or the sale of the Shares as contemplated hereby; and to the
          knowledge of such counsel, except as described in the Registration
          Statement and Prospectus, no person is entitled to registration rights
          with respect to shares of capital stock or other securities of the
          Company pursuant to any contracts or agreements filed as exhibits to
          the Registration Statement.

          In rendering such opinion, such counsel may rely as to matters of law
     of any jurisdiction other than that of the States of Delaware and
     California and the federal securities law, on opinions of local counsel,
     and as to matters of fact, on certificates of officers of the Company and
     of governmental officials, in which case their opinion is to state that
     they are so doing and that the Underwriters are justified in relying on
     such opinions or certificates and copies of said opinions or certificates
     are to be attached to the opinion. Such counsel shall also include a
     statement to the effect that although they have not independently verified
     the accuracy and completeness of the statements contained in the
     Registration Statement and/or Prospectus, based upon their participation in
     the preparation of the Registration Statement and Prospectus and their
     review and discussion of the contents thereof, nothing has come to such
     counsel's attention that would lead such counsel to believe that at the
     effective date of the Registration Statement, at the date of the Prospectus
     or at the time of purchase or additional time of purchase, the Registration
     Statement or the Prospectus, or any such amendment or supplement except for
     the financial statements and schedules and other financial data and the
     matters referred to in subparagraph (vii) hereof, as to which such counsel
     need not express any statement, contained or contains any untrue statement
     of a material fact or omitted or omits to state a material fact required to
     be stated therein or necessary to make the statements therein not
     misleading;

          (b)  You shall have received at the time of purchase and at the
     additional time of purchase, as the case may be, the opinion of Ryan
     Kromholz & Manion, S.C., special counsel to the Company with respect to
     patents and proprietary rights, dated the time of purchase or the
     additional time of purchase, as the case may be, with reproduced copies

                                       17
<PAGE>

     for each of the other Underwriters and in form reasonably satisfactory to
     Dewey Ballantine LLP, counsel for the Underwriters, stating that:

               (i)    To such counsel's knowledge, except as described in the
          Prospectus, (A) the Company has valid license rights or clear title to
          the Intellectual Property referenced in the Prospectus, and there are
          no rights of third parties to any such Intellectual Property; (B)
          there is no infringement or other violation by third parties of any of
          the Intellectual Property of the Company referenced in the Prospectus;
          (C) there is no infringement or other violation by the Company of any
          Intellectual Property of others; (D) there is no pending or threatened
          action, suit proceeding or claim by governmental authorities or others
          that the Company infringes or otherwise violates any Intellectual
          Property of others, and such counsel is unaware of any facts which
          would form a reasonable basis for any such claim; and (E) there is no
          pending or threatened action, suit, proceeding or claim by
          governmental authorities or others challenging the rights of the
          Company in or to, or challenging the scope of, any Intellectual
          Property of the Company referenced in the Prospectus, and such counsel
          is unaware of any facts which would form a reasonable basis for any
          such claim;


               (ii)   to such counsel's knowledge, the patent applications of
          the Company presently on file disclose patentable subject matter, and
          such counsel is not aware of any inventorship challenges, any
          interference which has been declared or provoked, or any other
          material fact with respect to the patent applications of the Company
          presently on file that (A) would preclude the issuance of patents with
          respect to such applications, or (B) would lead such counsel to
          conclude that such patents, when issued, would not be valid and
          enforceable in accordance with applicable regulations; and

               (iii)  the statements in the Registration Statement and the
          Prospectus referencing Intellectual Property matters, insofar as such
          statements constitute summaries of legal matters, contracts,
          agreements, documents or proceedings referred to therein, or refer to
          statements of law or legal conclusions, are in all material respects
          accurate and complete statements or summaries of the matters therein
          set forth. Nothing has come to such counsel's attention that causes
          them to believe that such above described portions of the Registration
          Statement, at the time such Registration Statement became effective,
          contained an untrue statement of a material fact or omitted to state a
          material fact required to be stated therein or necessary to make the
          statements therein not misleading, or that such above described
          portions of the Prospectus and at the date of the Prospectus and at
          all times leading up to and including the time of purchase and the
          additional time of purchase, as the case may be, contained an untrue
          statement of material fact or omitted to state a material fact
          required to be stated therein or necessary to make the statements
          therein, in light of the circumstances under which they were made, not
          misleading.

          (c)  You shall have received at the time of purchase and at the
     additional time of purchase, as the case may be, the opinion of Hogan &
     Hartson, L.L.P., regulatory

                                       18
<PAGE>

     counsel to the Company, dated the time of purchase or the additional time
     of purchase, as the case may be, with reproduced copies for each of the
     other Underwriters and in form reasonably satisfactory to Dewey Ballantine
     LLP, counsel for the Underwriters, stating that the statements in the
     Registration Statement and the Prospectus referencing regulatory matters,
     insofar as such statements constitute summaries of food and drug regulatory
     matters with respect to the Company, as of the date of the Registration
     Statement and the Prospectus and as of the date of such opinion, are in all
     material respects accurate and complete statements or summaries of the
     matters therein set forth; and nothing has come to such counsel's attention
     that causes such counsel to believe that the above-described portions of
     the Registration Statement and the Prospectus, at the date of the
     Registration Statement and the Prospectus or at the date of such opinion,
     contained or contains an untrue statement of material fact or omitted or
     omits to state a material fact required to be stated therein or necessary
     to make the statements therein, in light of the circumstances under which
     they were made, not misleading.

          (d)  You shall have received at the time of purchase and at the
     additional time of purchase, as the case may be, the favorable opinion of
     Dewey Ballantine LLP, counsel for the Underwriters, dated the time of
     purchase or the additional time of purchase, as the case may be, with
     respect to the issuance and sale of the Shares by the Company, the
     Registration Statement, the Prospectus (together with any supplement
     thereto) and such other related matters as the Underwriters may require.

          (e)  You shall have received from Pricewaterhouse Coopers LLP, letters
     dated, respectively, the date of this Agreement and the time of purchase
     and additional time of purchase, as the case may be, and addressed to the
     Underwriters (with reproduced copies for each of the Underwriters) in the
     forms heretofore reasonably acceptable to Dewey Ballantine LLP, counsel for
     the Underwriters.

          (f)  No amendment or supplement to the Registration Statement or
     Prospectus shall be filed prior to the time the Registration Statement
     becomes effective to which you object in writing.

          (g)  The Registration Statement shall become effective, or if Rule
     430A under the Act is used, the Prospectus shall have been filed with the
     Commission pursuant to Rule 424(b) under the Act, at or before 5:30 P.M.,
     New York City time, on the date of this Agreement, unless a later time (but
     not later than 5:30 P.M., New York City time, on the second full business
     day after the date of this Agreement) shall be agreed to by the Company and
     you in writing or by telephone, confirmed in writing; provided, however,
                                                           --------  -------
     that the Company and you and any group of Underwriters, including you, who
     have agreed hereunder to purchase in the aggregate at least fifty percent
     (50%) of the Firm Shares may from time to time agree on a later date.

          (h)  Prior to the time of purchase or the additional time of purchase,
     as the case may be, (i) no stop order with respect to the effectiveness of
     the Registration Statement shall have been issued under the Act or
     proceedings initiated under Section 8(d) or 8(e) of the Act; (ii) the
     Registration Statement and all amendments thereto, or modifications
     thereof, if any, shall not contain an untrue statement of a material fact
     or omit to state a

                                       19
<PAGE>

     material fact required to be stated therein or necessary to make the
     statements therein not misleading in light of the circumstances under which
     they were made; and (iii) the Prospectus and all amendments or supplements
     thereto, or modifications thereof, if any, shall not contain an untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein, in the light
     of the circumstances under which they are made, not misleading.

          (i)  Between the time of execution of this Agreement and the time of
     purchase or the additional time of purchase, as the case may be, no event
     shall have occurred that has had a Material Adverse Effect or that would be
     expected to have a Material Adverse Effect (other than as specifically
     identified in the Registration Statement or Prospectus).

          (j)  The Company will, at the time of purchase or additional time of
     purchase, as the case may be, deliver to you a certificate of its President
     and its Chief Financial Officer to the effect that the representations and
     warranties of the Company as set forth in this Agreement are true and
     correct as of each such date, that the Company has performed such of their
     obligations under this Agreement as are to be performed at or before the
     time of purchase and at or before the additional time of purchase, as the
     case may be, and the conditions set forth in paragraphs (g), (h) and (i) of
     this Section 7 have been met.

          (k)  You shall have received signed Lock-Up Agreements, dated the date
     of this Agreement, from each of the officers and directors of the Company
     and the holders of Common Stock and securities convertible into or
     exchangeable or exercisable for Common Stock (including options and
     warrants) relating to, in the aggregate, __% of the Company's outstanding
     Common Stock on a fully diluted basis stating that such persons will not
     sell, offer to sell, contract to sell, hypothecate, pledge, grant any
     option to sell or otherwise dispose of, directly or indirectly, any shares
     of Common Stock or securities convertible into or exchangeable or
     exercisable for Common Stock or options, warrants or other rights to
     purchase Common Stock or any other securities of the Company that are
     substantially similar to Common Stock for a period of one hundred and
     eighty (180) days after the date of the Prospectus without the prior
     written consent of UBSW.

          (l)  The Company shall have furnished to you such other documents and
     certificates as to the accuracy and completeness of any statement in the
     Registration Statement and the Prospectus as of the time of purchase and
     the additional time of purchase, as the case may be, as you may reasonably
     request.

          (m)  The Shares shall have been approved for listing for quotation on
     NASDAQ, subject only to notice of issuance at or prior to the time of
     purchase or the additional time of purchase, as the case may be.

                                       20
<PAGE>

          8.   Effective Date of Agreement; Termination. This Agreement shall
               ----------------------------------------
become effective (i) if Rule 430A under the Act is not used, when you shall have
received notification of the effectiveness of the Registration Statement, or
(ii) if Rule 430A under the Act is used, when the parties hereto have executed
and delivered this Agreement.

          The obligations of the several Underwriters hereunder shall be subject
to termination in the absolute discretion of you or any group of Underwriters
(which may include you) which has agreed to purchase in the aggregate at least
fifty percent (50%) of the Firm Shares, (i) if, since the time of execution of
this Agreement or the respective dates as of which information is given in the
Registration Statement and Prospectus, there has been any event that has had a
Material Adverse Effect or that is reasonably likely to have a Material Adverse
Effect (other than as specifically identified in the Registration Statement and
Prospectus) which would, in your judgment or in the judgment of such group of
Underwriters, make it impracticable to market the Shares, or, (ii) if, at any
time prior to the time of purchase or, with respect to the purchase of any
Additional Shares, the additional time of purchase, as the case may be, trading
in securities on the New York Stock Exchange, the American Stock Exchange or the
Nasdaq National Market shall have been suspended or limitations or minimum
prices shall have been established on the New York Stock Exchange, the American
Stock Exchange or the Nasdaq National Market, or (iii) if a banking moratorium
shall have been declared either by the United States or New York State
authorities, or (iv) if the United States shall have declared war in accordance
with its constitutional processes or there shall have occurred any material
outbreak or escalation of hostilities or other national or international
calamity or crisis of such magnitude in its effect on the financial markets of
the United States as, in your judgment or in the judgment of such group of
Underwriters, to make it impracticable to market the Shares.

          If you or any group of Underwriters elects to terminate this Agreement
as provided in this Section 8, the Company and each other Underwriter shall be
notified promptly by letter or telegram.

          If the sale to the Underwriters of the Shares, as contemplated by this
Agreement, is not carried out by the Underwriters for any reason permitted under
this Agreement or if such sale is not carried out because the Company shall be
unable to comply with any of the terms of this Agreement, the Company shall not
be under any obligation or liability under this Agreement (except to the extent
provided in Sections 5(n), 6 and 10 hereof), and the Underwriters shall be under
no obligation or liability to the Company under this Agreement (except to the
extent provided in Section 10 hereof) or to one another hereunder.

          9.   Increase in Underwriters' Commitments. Subject to Sections 7 and
               -------------------------------------
8, if any Underwriter shall default in its obligation to take up and pay for the
Firm Shares to be purchased by it hereunder (otherwise than for a reason
sufficient to justify the termination of this Agreement under the provisions of
Section 8 hereof) and if the number of Firm Shares which all Underwriters so
defaulting shall have agreed but failed to take up and pay for does not exceed
ten percent (10%) of the total number of Firm Shares, the non-defaulting
Underwriters shall take up and pay for (in addition to the aggregate number of
Firm Shares they are obligated to purchase pursuant to Section 1 hereof) the
number of Firm Shares agreed to be purchased by all such defaulting
Underwriters, as hereinafter provided. Such Shares shall be taken up and paid
for by such non-defaulting Underwriter or Underwriters in such amount or amounts
as you may

                                       21
<PAGE>

designate with the consent of each Underwriter so designated or, in the event no
such designation is made, such Shares shall be taken up and paid for by all non-
defaulting Underwriters pro rata in proportion to the aggregate number of Firm
Shares set opposite the names of such non-defaulting Underwriters in Schedule A.
                                                                     ----------

          Without relieving any defaulting Underwriter from its obligations
hereunder, the Company agrees with the non-defaulting Underwriters that it will
not sell any Firm Shares hereunder unless all of the Firm Shares are purchased
by the Underwriters (or by substituted Underwriters selected by you with the
approval of the Company or selected by the Company with your approval).

          If a new Underwriter or Underwriters are substituted by the
Underwriters or by the Company for a defaulting Underwriter or Underwriters in
accordance with the foregoing provision, the Company or you shall have the right
to postpone the time of purchase for a period not exceeding five (5) business
days in order that any necessary changes in the Registration Statement and
Prospectus and other documents may be effected.

          The term "Underwriter" as used in this Agreement shall refer to and
                    -----------
include any Underwriter substituted under this Section 9 with like effect as if
such substituted Underwriter had originally been named in Schedule A.
                                                          ----------

          If the aggregate number of Shares which the defaulting Underwriter or
Underwriters agreed to purchase exceeds ten percent (10%) of the total number of
Shares which all Underwriters agreed to purchase hereunder, and if neither the
non-defaulting Underwriters nor the Company shall make arrangements within the
five (5) business day period stated above for the purchase of all the Shares
which the defaulting Underwriter or Underwriters agreed to purchase hereunder,
this Agreement shall be terminated without further act or deed and without any
liability on the part of the Company to any non-defaulting Underwriter and
without any liability on the part of any non-defaulting Underwriter to the
Company.  Nothing in this paragraph, and no action taken hereunder, shall
relieve any defaulting Underwriter from liability in respect of any default of
such Underwriter under this Agreement.

          10.  Indemnity and Contribution.
               --------------------------

          (a)  The Company agrees to indemnify, defend and hold harmless each
Underwriter, its partners, directors and officers, and any person who controls
any Underwriter within the meaning of Section 15 of the Act or Section 20 of the
Exchange Act, and the successors and assigns of all of the foregoing persons
from and against any loss, damage, reasonable expense, liability or claim
(including the reasonable cost of investigation) which, jointly or severally,
any such Underwriter or any such person may incur under the Act, the Exchange
Act, the common law or otherwise, insofar as such loss, damage, reasonable
expense, liability or claim arises out of or is based upon (i) any untrue
statement or alleged untrue statement of a material fact contained in the
Registration Statement (or in the Registration Statement as amended by any post-
effective amendment thereof by the Company) or in a Prospectus (the term
Prospectus for the purpose of this Section 10 being deemed to include any
Preliminary Prospectus, the Prospectus and the Prospectus as amended or
supplemented by the Company), or arises out of or is based upon any omission or
alleged omission to state a material

                                       22
<PAGE>

fact required to be stated in either such Registration Statement or Prospectus
or necessary to make the statements made therein not misleading in light of the
circumstance in which they were made, except insofar as any such loss, damage,
reasonable expense, liability or claim arises out of or is based upon any untrue
statement or alleged untrue statement of a material fact contained in and in
conformity with information furnished in writing by or on behalf of any
Underwriter through you to the Company expressly for use with reference to such
Underwriter in such Registration Statement or such Prospectus or arises out of
or is based upon any omission or alleged omission to state a material fact in
connection with such information required to be stated in such Registration
Statement or such Prospectus or necessary to make such information not
misleading in light of the circumstance in which they were made or (ii) any
untrue statement or alleged untrue statement made by the Company in Section 3 of
this Agreement or the failure by the Company to perform when and as required any
agreement or covenant contained herein or (iii) any untrue statement or alleged
untrue statement of any material fact contained in any audio or visual materials
provided by the Company or based upon written information furnished by or on
behalf of the Company including, without limitation, slides, videos, films, tape
recordings, used in connection with the marketing of the Shares, or (iv) the
Directed Share Program, provided that, the Company shall not be responsible for
any loss, damage, expense, liability, or claim that is finally judicially
determined to have resulted from the bad faith or gross negligence of the
Underwriters in conducting the Directed Share Program; provided, however, that
                                                       --------  -------
the indemnification contained in this paragraph (a) with respect to any
preliminary prospectus or the Prospectus shall not inure to the benefit of any
Underwriter from whom the person asserting any such losses, claims, damages or
liabilities purchased Shares, or any person controlling such Underwriters, if
(i) a copy of the Prospectus (as then amended or supplemented if the Company
shall have furnished any amendments or supplements thereto) was not sent or
given by or on behalf of such Underwriter to such person, if required by law so
to have delivered, at or prior to the written confirmation of the sale of the
Shares to such person, (ii) the Prospectus (as so amended or supplemented) would
have cured the defect giving rise to such loss, claim, damage or liability and
(iii) the Company delivered the Prospectus to the several Underwriters in
requisite quantity on a timely basis to permit such delivery or sending.

          If any action, suit or proceeding (together, a "Proceeding") is
                                                          ----------
brought against an Underwriter or any such person in respect of which indemnity
may be sought against the Company pursuant to the foregoing paragraph, such
Underwriter or such person shall promptly notify the Company in writing of the
institution of such Proceeding and the Company shall assume the defense of such
Proceeding, including the employment of counsel reasonably satisfactory to such
indemnified party and payment of all fees and expenses; provided, however, that
                                                        --------  -------
the omission to so notify the Company shall not relieve the Company from any
liability which the Company may have to any Underwriter or any such person or
otherwise unless such failure materially prejudices, or is reasonably likely to
materially prejudice, the Company.  Such Underwriter or such person shall have
the right to employ its or their own counsel in any such case, but the fees and
expenses of such counsel shall be at the expense of such Underwriter or of such
person unless the employment of such counsel shall have been authorized in
writing by the Company in connection with the defense of such Proceeding or the
Company shall not have, within a reasonable period of time in light of the
circumstances, employed counsel to defend such Proceeding or such indemnified
party or parties shall have reasonably concluded based on the advice of counsel
that there may be defenses available to it or them which are different from,
additional to or in conflict with those available to the Company (in which case
the Company

                                       23
<PAGE>

shall not have the right to direct the defense of such Proceeding on behalf of
the indemnified party or parties), in any of which events such reasonable fees
and expenses shall be borne by the Company and paid as incurred (it being
understood, however, that the Company shall not be liable for the expenses of
more than one separate counsel (in addition to local counsel) in any one
Proceeding or series of related Proceedings in the same jurisdiction
representing the indemnified parties who are parties to such Proceeding). The
Company shall not be liable for any settlement of any Proceeding effected
without the written consent of the Company but if settled with the written
consent of the Company, the Company agrees to indemnify and hold harmless any
Underwriter and any such person from and against any loss or liability by reason
of such settlement. Notwithstanding the foregoing sentence, if at any time an
indemnified party shall have requested in writing an indemnifying party to
reimburse the indemnified party for reasonable fees and expenses of counsel as
contemplated by the second sentence of this paragraph, then the indemnifying
party agrees that it shall be liable for any settlement of any Proceeding
effected without its written consent if (i) such settlement is entered into more
than sixty (60) days after receipt by such indemnifying party of the aforesaid
written request, (ii) such indemnifying party shall not have reimbursed the
indemnified party in accordance with such written request prior to the date of
such settlement and (iii) such indemnified party shall have given the
indemnifying party at least thirty (30) days' prior written notice of its
intention to settle. Notwithstanding the foregoing sentence, the indemnified
party will not, under any circumstances without the indemnifying party's prior
written consent, effect a settlement of any pending or threatened Proceeding
unless such settlement includes an unconditional release of the indemnifying
party from all liability claims that relate to the subject matter of such
Proceeding and does not include an admission of fault, culpability, or a failure
to act by or on behalf of such indemnifying party. No indemnifying party shall,
without the prior written consent of the indemnified party, effect any
settlement of any pending or threatened Proceeding in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party, unless such settlement includes an
unconditional release of such indemnified party from all liability on claims
that are the subject matter of such Proceeding and does not include an admission
of fault, culpability or a failure to act, by or on behalf of such indemnified
party.

          (b)  In connection with the offer and sale of the Reserved Shares, the
Company agrees to purchase from UBSW, at its request, for full purchase price
all Reserved Shares which were subject to a properly confirmed agreement to
purchase and for which any Directed Share Participant failed to pay therefor and
accept delivery thereof.

          (c)  Each Underwriter severally agrees to indemnify, defend and hold
harmless the Company, its directors and officers, and any person who controls
the Company within the meaning of Section 15 of the Act or Section 20 of the
Exchange Act, and the successors and assigns of all of the foregoing persons
from and against any loss, damage, reasonable expense, liability or claim
(including the reasonable cost of investigation) which, jointly or severally,
the Company or any such person may incur under the Act, the Exchange Act, the
common law or otherwise, insofar as such loss, damage, reasonable expense,
liability or claim arises out of or is based upon any untrue statement or
alleged untrue statement of a material fact contained in and in conformity with
information furnished in writing by or on behalf of such Underwriter through you
to the Company expressly for use with reference to such Underwriter in the
Registration

                                       24
<PAGE>

Statement (or in the Registration Statement as amended by any post-effective
amendment thereof by the Company) or in a Prospectus.

          If any Proceeding is brought against the Company or any such person in
respect of which indemnity may be sought against any Underwriter pursuant to the
foregoing paragraph, the Company or such person shall promptly notify such
Underwriter in writing of the institution of such Proceeding and such
Underwriter shall assume the defense of such Proceeding, including the
employment of counsel reasonably satisfactory to such indemnified party and
payment of all fees and expenses; provided, however, that the omission to so
                                  --------  -------
notify such Underwriter shall not relieve such Underwriter from any liability
which such Underwriter may have to the Company or any such person or otherwise.
The Company or such person shall have the right to employ its own counsel in any
such case, but the fees and expenses of such counsel shall be at the expense of
the Company or such person unless the employment of such counsel shall have been
authorized in writing by such Underwriter in connection with the defense of such
Proceeding or such Underwriter shall not have, within a reasonable period of
time in light of the circumstances, employed counsel to have charge of the
defense of such Proceeding or such indemnified party or parties shall have
reasonably concluded that there may be defenses available to it or them which
are different from or additional to or in conflict with those available to such
Underwriter (in which case such Underwriter shall not have the right to direct
the defense of such Proceeding on behalf of the indemnified party or parties,
but such Underwriter may employ counsel and participate in the defense thereof
but the fees and expenses of such counsel shall be at the expense of such
Underwriter), in any of which events such fees and expenses shall be borne by
such Underwriter and paid as incurred (it being understood, however, that such
Underwriter shall not be liable for the expenses of more than one separate
counsel (in addition to any local counsel) in any one Proceeding or series of
related Proceedings in the same jurisdiction representing the indemnified
parties who are parties to such Proceeding).  No Underwriter shall be liable for
any settlement of any such Proceeding effected without the written consent of
such Underwriter but if settled with the written consent of such Underwriter,
such Underwriter agrees to indemnify and hold harmless the Company and any such
person from and against any loss or liability by reason of such settlement.
Notwithstanding the foregoing sentence, if at any time an indemnified party
shall have requested an indemnifying party to reimburse the indemnified party
for fees and expenses of counsel as contemplated by the second sentence of this
paragraph, then the indemnifying party agrees that it shall be liable for any
settlement of any Proceeding effected without its written consent if (i) such
settlement is entered into more than sixty (60) days after receipt by such
indemnifying party of the aforesaid request, (ii) such indemnifying party shall
not have reimbursed the indemnified party in accordance with such request prior
to the date of such settlement and (iii) such indemnified party shall have given
the indemnifying party at least thirty (30) days' prior notice of its intention
to settle.  Notwithstanding the foregoing sentence, the indemnified party will
not, under any circumstances without the indemnifying party's prior written
consent, effect a settlement of any pending or threatened Proceeding unless such
settlement includes an unconditional release of the indemnifying party from all
liability claims that relate to the subject matter of such Proceeding and does
not include an admission of fault, culpability, or a failure to act by or on
behalf of such indemnifying party. No indemnifying party shall, without the
prior written consent of the indemnified party, effect any settlement of any
pending or threatened Proceeding in respect of which any indemnified party is or
could have been a party and indemnity could have been sought hereunder by such
indemnified party, unless

                                       25
<PAGE>

such settlement includes an unconditional release of such indemnified party from
all liability on claims that are the subject matter of such Proceeding.

          (d)  If the indemnification provided for in this Section 10 is
unavailable to an indemnified party under subsections (a), (b) or (c) of this
Section 10 in respect of any losses, damages, expenses, liabilities or claims
referred to therein, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall contribute to the amount paid or
payable by such indemnified party as a result of such losses, damages, expenses,
liabilities or claims (i) in such proportion as is appropriate to reflect the
relative benefits received by the Company on the one hand and the Underwriters
on the other hand from the offering of the Shares or (ii) if the allocation
provided by clause (i) above is not permitted by applicable law, in such
proportion as is appropriate to reflect not only the relative benefits referred
to in clause (i) above but also the relative fault of the Company on the one
hand and of the Underwriters on the other in connection with the statements or
omissions which resulted in such losses, damages, expenses, liabilities or
claims, as well as any other relevant equitable considerations. The relative
benefits received by the Company on the one hand and the Underwriters on the
other shall be deemed to be in the same respective proportions as the total
proceeds from the offering (net of underwriting discounts and commissions but
before deducting expenses) received by the Company and the total underwriting
discounts and commissions received by the Underwriters, bear to the aggregate
public offering price of the Shares. The relative fault of the Company on the
one hand and of the Underwriters on the other shall be determined by reference
to, among other things, whether the untrue statement or alleged untrue statement
of a material fact or omission or alleged omission relates to information
supplied by the Company or by the Underwriters and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. The amount paid or payable by a party as a result of the
losses, damages, expenses, liabilities and claims referred to in this subsection
shall be deemed to include any legal or other fees or expenses reasonably
incurred by such party in connection with investigating, preparing to defend or
defending any Proceeding.

          (e)  The Company and the Underwriters agree that it would not be just
and equitable if contribution pursuant to this Section 10 were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation that does not take account of the
equitable considerations referred to in subsection (c) above. Notwithstanding
the provisions of this Section 10, no Underwriter shall be required to
contribute any amount in excess of the amount by which the total price at which
the Shares underwritten by such Underwriter and distributed to the public were
offered to the public exceeds the amount of any damage which such Underwriter
has otherwise been required to pay by reason of such untrue statement or alleged
untrue statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Act) shall be
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation. The Underwriters' obligations to contribute pursuant to this
Section 10 are several in proportion to their respective underwriting
commitments and not joint.

          (f)  The indemnity and contribution agreements contained in this
Section 10 and the covenants, warranties and representations of the Company
contained in this Agreement shall remain in full force and effect regardless of
any investigation made by or on behalf of any Underwriter, its partners,
directors or officers or any person (including each partner, officer or

                                       26
<PAGE>

director of such person) who controls any Underwriter within the meaning of
Section 15 of the Act or Section 20 of the Exchange Act, or by or on behalf of
the Company its directors or officers or any person who controls the Company
within the meaning of Section 15 of the Act or Section 20 of the Exchange Act,
and shall survive any termination of this Agreement or the issuance and delivery
of the Shares. The Company and each Underwriter agree promptly to notify each
other of the commencement of any Proceeding against it and, in the case of the
Company, against any of the Company's officers or directors in connection with
the issuance and sale of the Shares, or in connection with the Registration
Statement or Prospectus.

          11.  Notices.  Except as otherwise herein provided, all statements,
               -------
requests, notices and agreements shall be in writing or by telegram and, if to
the Underwriters, shall be sufficient in all respects if delivered or sent to
UBS Warburg LLC, 299 Park Avenue, New York, N.Y. 10171-0026, Attention:
Syndicate Department and, if to the Company, shall be sufficient in all respects
if delivered or sent to the Company at the offices of the Company at 735 Palomar
Ave., Sunnyvale, California, 94086, Attention: John W. Morgan, Chief Executive
Officer. Notwithstanding the foregoing, notices pursuant to this section shall
be directed to any new address/contact person identified in writing to the
notified party.

                                       27
<PAGE>

          12.  Governing Law; Construction.  This Agreement and any claim,
               ---------------------------
counterclaim or dispute of any kind or nature whatsoever arising out of or in
any way relating to this Agreement ("Claim"), directly or indirectly, shall be
                                     -----
governed by, and construed in accordance with, the laws of the State of New
York.  The Section headings in this Agreement have been inserted as a matter of
convenience of reference and are not a part of this Agreement.

          13.  Submission to Jurisdiction. Except as set forth below, no Claim
               --------------------------
may be commenced, prosecuted or continued in any court other than the courts of
the State of New York located in the City and County of New York or in the
United States District Court for the Southern District of New York, which courts
shall have jurisdiction over the adjudication of such matters, and the Company
consents to the jurisdiction of such courts and personal service with respect
thereto. The Company hereby consents to personal jurisdiction, service and venue
in any court in which any Claim arising out of or in any way relating to this
Agreement is brought by any third party against UBSW or any indemnified party.
Each of UBSW and the Company (on their respective behalfs and, to the extent
permitted by applicable law, on behalf of their respective stockholders and
affiliates) waives all right to trial by jury in any action, proceeding or
counterclaim (whether based upon contract, tort or otherwise) in any way arising
out of or relating to this Agreement. The Company agrees that a final judgment
in any such action, proceeding or counterclaim brought in any such court shall
be conclusive and binding upon the Company and may be enforced in any other
courts in the jurisdiction of which the Company is or may be subject, by suit
upon such judgment.

          14.  Parties at Interest. The Agreement herein set forth has been and
               -------------------
is made solely for the benefit of the Underwriters and the Company and to the
extent provided in Section 10 hereof the controlling persons, directors and
officers referred to in such section, and their respective successors, assigns,
heirs, personal representatives and executors and administrators. No other
person, partnership, association or corporation (including a purchaser, as such
purchaser, from any of the Underwriters) shall acquire or have any right under
or by virtue of this Agreement.

          15.  Counterparts. This Agreement may be signed by the parties in one
               ------------
or more counterparts which together shall constitute one and the same agreement
among the parties.

          16.  Successors and Assigns.  This Agreement shall be binding upon the
               ----------------------
Underwriters, the Company and their successors and assigns and any successor or
assign of any substantial portion of the Company's, and any of the Underwriters'
respective businesses and/or assets.

          17.  Miscellaneous. UBSW, an indirect, wholly owned subsidiary of UBS
               -------------
AG, is not a bank and is separate from any affiliated bank, including any U.S.
branch or agency of UBS AG. Because UBSW is a separately incorporated entity, it
is solely responsible for its own contractual obligations and commitments,
including obligations with respect to sales and purchases of securities.
Securities sold, offered or recommended by UBSW are not deposits, are not
insured by the Federal Deposit Insurance Corporation, are not guaranteed by a
branch or agency, and are not otherwise an obligation or responsibility of a
branch or agency.

                                       28
<PAGE>

          A lending affiliate of UBSW may have lending relationships with
issuers of securities underwritten or privately placed by UBSW.  To the extent
required under the securities laws, prospectuses and other disclosure documents
for securities underwritten or privately placed by UBSW will disclose the
existence of any such lending relationships and whether the proceeds of the
issue will be used to repay debts owed to affiliates of UBSW.

                                       29
<PAGE>

          If the foregoing correctly sets forth the understanding among the
Company  and the Underwriters, please so indicate in the space provided below
for the purpose, whereupon this letter and your acceptance shall constitute a
binding agreement among the Company and the Underwriters, severally.

                                        Very truly yours,

                                        CURON MEDICAL, INC.

                                        By: _____________________________
                                            Name:
                                            Title:


Accepted and agreed to as of the
 date first above written, on behalf of
 themselves and the other several Underwriters
 named in Schedule A
          ----------

UBS WARBURG LLC
CIBC WORLD MARKETS CORP.
SG COWEN SECURITIES CORPORATION

By:  UBS WARBURG LLC

By:  __________________
     Name:
     Title: Managing Director

By:  __________________________
     Name:
     Title: Director

                                       30
<PAGE>

                                  SCHEDULE A

<TABLE>
<CAPTION>
                                                                   Number of
Underwriter                                                       Firm Shares
-----------                                                       -----------
<S>                                                               <C>
UBS Warburg LLC...........................................
CIBC World Markets Corp...................................
SG Cowen Securities Corporation...........................



                                                                  -----------
               Total......................................
                                                                  ===========
</TABLE>

                                       31


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