system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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right, on a co-exclusive basis (solely with Dova and its Affiliates), to Detail and promote the Product in the Specialty in the Territory in the Field, and to conduct the Valeant Activities and the activities of the institutional account management team (pursuant to and subject to the terms of Section 4.1.5) for the Product in the Territory in the Field in accordance with the terms and conditions of this Agreement. Notwithstanding the foregoing, Dova retains and reserves the right for Dova and its Affiliates to promote the Product in the Territory including in the Specialty. Valeant shall have no other rights relating to the Product, except as specifically set forth in this Agreement and, without limiting the foregoing, except as set out in Section 4.1.5, if agreed upon, Valeant shall have no right to, and shall not, conduct the Valeant Activities for the Product outside the Specialty or outside the Territory or for use outside the Field. Except to Affiliates of Valeant, Valeant's rights and obligations under this Section 2.1 are non-transferable, non-assignable, and non-delegable. Except to Affiliates of Valeant, Valeant shall not subcontract the Valeant Activities with any Third Party (including any contract sales force). Any obligation of Valeant under or pursuant to this Agreement may be satisfied, met or fulfilled, in whole or in part, at Valeant's sole and exclusive option, either by Valeant or its Affiliates. Valeant guarantees the performance of all actions, agreements and obligations to be performed by its Affiliates under the terms and conditions of this Agreement. For clarity, Valeant shall not have any license rights hereunder nor any rights to sublicense any rights hereunder. Source: DOVA PHARMACEUTICALS INC., 10-Q, 11/8/2018 2.2 Retention of Rights. Except with respect to the exclusive rights granted to Valeant to conduct the Valeant Activities for the Product in the Specialty in the Territory in the Field pursuant to Section 2.1 and, and if agreed upon, outside the Specialty in the Territory in the Field pursuant to Section 4.1.5, Dova retains all rights in and to the Product. Without limiting the generality of the foregoing (and without limiting Dova's retained rights set forth in Section 2.1), Dova specifically retains the following rights (and Valeant and its Affiliates shall have no rights to the following, except as set forth below in this Section 2.2): 2.2.1 responsibility for promoting the Product outside the Specialty; 2.2.2 responsibility for the manufacture and distribution of the Product, and any future development of the Product; 2.2.3 responsibility for all decisions regarding regulatory submissions and, except as expressly set forth herein, for interactions with any Governmental Authority, including but not limited to FDA, with respect to the Product; 2.2.4 responsibility for final approval of all Product Materials content (including submission of Promotional Materials to FDA's Office of Prescription Drug Promotion) with respect to the conduct of the Valeant Activities for Product, except as expressly set forth herein; 2.2.5 selling and booking all sales of the Product; and 2.2.6 responsibility for handling all safety related activities related to Product as set forth in ARTICLE 5 (including submitting all safety reports and interacting with Governmental Authorities with respect thereto) and initiating and managing any Product recalls. For clarity, except as provided in Sections 2.1 or 2.4, Valeant shall not acquire any license or other intellectual property interest, by implication or otherwise, in any technology, Know-How or other intellectual property owned or controlled by Dova or any of its Affiliates, and Dova is not providing any such technology, Know-How or other intellectual property, or any assistance related thereto, to Valeant for any use other than for the mutual benefit of the Parties as expressly contemplated hereby. 2.3 Non-Competition; Non-Solicitation. 2.3.1 Non-Competition. (a) [***], neither Valeant nor its Affiliates shall, directly or indirectly, [***] in the Territory other than the Product; provided that if the Agreement is terminated by Dova pursuant to [***], then any Tail Period shall be immediately terminated if either Valeant or any of its Affiliates, directly or indirectly, [***] in the Territory other than the Product during such Tail Period. Notwithstanding the foregoing, this Section 2.3.1(a) shall not apply to any products marketed, promoted, detailed, offered for sale, or sold by any business (or any portion thereof), other Person, or group of Persons, [***]. (a) [***], neither Dova nor is Affiliates shall, directly or indirectly, [***]. Notwithstanding the foregoing, this Section 2.3.1(b) shall not apply to any products marketed, promoted, detailed, offered for sale, or sold by any business (or any portion thereof), other Person, or
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Extract the exact clause related to "Expiration Date" from the excerpt above.