1. | The Company hereby agrees that, for the period beginning on the date hereof and continuing until the earlier of (a) the execution of a definitive agreement with respect to the Proposed Transaction, (b) Sanofi informing the Company that Sanofi is no longer interested in proceeding with the Proposed Transaction on the terms set forth in that certain revised, non-binding indicative proposal, dated February 22, 2023, from Sanofi to the Company (the “Indicative Proposal”), (c) a material breach by Sanofi of this letter agreement or the confidentiality agreement, dated February 26, 2023, by and between Sanofi and the Company (the “Confidentiality Agreement”), and (d) 11:59 p.m., Eastern time, on March 13, 2023 (such period, the “Exclusivity Period”), the Company will negotiate exclusively with Sanofi and will not, and will cause its subsidiaries and its controlled affiliates, and will direct its, its subsidiaries’ and its controlled affiliates’ respective directors, officers, employees, agents, advisors, attorneys and other representatives (the foregoing persons identified in this Section 1, collectively, “Company Representatives”) not to, directly or indirectly, (i) except with respect to Sanofi and its subsidiaries and its affiliates and each of its and their directors, officers, partners, principals, members, employees, financial advisors, counsel, consultants, accountants and other representatives (collectively, “Sanofi Representatives”), initiate, knowingly solicit or encourage, or negotiate any proposal or offer (whether publicly or otherwise) that is structured to permit any person or group to acquire beneficial ownership of twenty percent (20%) or more of the total voting power of any class of equity securities of the Company or twenty percent (20%) or more of the consolidated total assets of the Company and its subsidiary (taken together), pursuant to a merger, consolidation, or other business combination, sale of shares of capital stock, sale of assets, tender offer or exchange offer, joint venture, license, reorganization, recapitalization, dissolution or similar transaction, including any single or multi-step transaction or series of related transactions (each of the foregoing with respect to a third-party other than Sanofi, an “Alternative Transaction”), (ii) provide material non-public information relating to the Company or any subsidiary or affiliate thereof in connection with an Alternative Transaction, or (iii) enter into any contract, agreement or arrangement concerning or relating to an Alternative Transaction. During the Exclusivity Period, in the event that Sanofi makes a determination that it is no longer interested in proceeding with the Proposed Transaction at least on the terms set forth in the Indicative Proposal, then Sanofi will promptly (and in any event within twenty-four (24) hours) communicate this determination to the Company in writing. |