Common use of Look-Back Clause in Contracts

Look-Back. In the event that the Exclusive Negotiation Period expires before Genzyme and Isis have entered into an Antisense License, Genzyme will have no further obligation to negotiate with Isis with respect to any Antisense License in [**] = Portions of this exhibit have been omitted pursuant to a confidential treatment request. An unredacted version of this exhibit has been filed separately with the Commission. any country in the Territory, and Genzyme will be free to grant one or more Antisense Licenses to one or more Third Parties in any country or countries in the Territory at Genzyme’s sole discretion; provided, however, that for a period equal to the longer of (i) the Term plus one (1) year or (ii) three (3) years following the expiration of the Exclusive Negotiation Period, Genzyme will not offer any Third Party an Antisense License containing a license scope and financial terms that are more favorable to the Third Party than the license scope and financial terms that Genzyme last offered to Isis during the Negotiation Period unless Genzyme first offers an Antisense License with such more favorable scope and terms to Isis in writing and Isis fails to accept such offer within fourteen (14) days after receiving it.