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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Exhibit 10.1 Certain information identified by bracketed asterisks ([ * * * ]) has been omitted from this exhibit because it is both not material and would be competitively harmful if publicly disclosed. EXCLUSIVE LICENSE AND PRODUCT DEVELOPMENT AGREEMENT THIS EXCLUSIVE LICENSE AND PRODUCT DEVELOPMENT AGREEMENT (this "Agreement") is entered into as of June 12, 2019 (the "Execution Date") by and between Eton Pharmaceuticals, Inc., a Delaware corporation with offices at 21925 W. Field Pkwy, Suite 235, Deer Park, Illinois, USA ("ETON"), and Aucta Pharmaceuticals, Inc., a Delaware corporation with offices at 71 Suttons Lane, Piscataway, NJ 08854 ("Aucta") . RECITALS WHEREAS, ETON is engaged in the business of licensing, developing, marketing, distributing and selling pharmaceutical drug products; WHEREAS, Aucta is engaged in the business of developing pharmaceutical drug products, including the Products (later defined); WHEREAS, ETON desires to obtain an exclusive license to the Products, the Dossiers (later defined), and Aucta Background Intellectual Property (later defined) for Marketing the Products in the Territory, and Aucta is willing to grant such an exclusive license to ETON under the terms and conditions set forth herein; WHEREAS, ETON will pay Aucta certain milestone, royalty and licensing payments based on the sale of Products in the Territory under the terms and conditions set forth herein; and WHEREAS, the parties hereto agree that, unless otherwise stated, the terms herein shall not be effective unless and until the Effective Date (later defined) occurs. NOW, THEREFORE, in consideration of the foregoing premises and the representations, warranties, covenants and agreements herein contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, ETON and Aucta, intending to be legally bound, hereby agree as follows: 1. DEFINITIONS. For the purposes of this Agreement, the following terms whether used in singular or plural form shall have the meanings as defined below: 1.1 "Affiliates" means, with respect to a Party or any Third Party, any corporation, firm, partnership or other entity that controls, is controlled by or is under common control with such entity. For the purposes of this definition, "control" means the ownership of at least 50% of the voting share capital of an entity or any other comparable equity or ownership interest. 1.2 "ANDA Litigation" shall have the meaning ascribed to the term in Section 7.5.2 of this Agreement. Source: ETON PHARMACEUTICALS, INC., 10-Q, 11/14/2019 CONFIDENTIAL 1.3 "Applicable Law" means the applicable laws, rules, regulations, guidelines and requirements of any Governmental Entity related to the development, registration, manufacture, importation, commercialization of the Products in the Territory, the manufacture in and export from the Territory of Manufacture, or any obligation under, or related to, this Agreement, including those obligations applicable to the Dossiers. 1.4 "Aucta Background Intellectual Property" means any and all patents and trademarks, patent and trademark applications or other patent and trademark rights, copyrights, inventions, know-how, trade secrets, proprietary knowledge, data, formulations, product specifications and other information owned, licensed to or controlled by Aucta relating to the Products, including but not limited to use, manufacture, and packaging thereof. 1.5 "Aucta Indemnified Parties" shall have the meaning ascribed to the term in Section 13.2 of this Agreement. 1.6 "Breaching Party" shall have the meaning ascribed to the term in Section 11.2 of this Agreement. 1.7 "Business Day" means any day, other than Saturday, Sunday or other day on which commercial banks are authorized or required to close in New York, New York or Rome, Italy. 1.8 "Calendar Quarter" means a three (3) consecutive month period ending on March 31, June 30, September 30 or December 31. 1.9 "Claim" includes a claim, notice, demand, action, proceeding, litigation, prosecution, arbitration, investigation, judgment, award, damage, loss, cost, expense or liability however arising, whether present, unascertained, immediate, future or contingent, whether based in contract, tort or statute and whether involving a Third Party or a Party or otherwise. 1.10 "Confidential Information" shall have the meaning ascribed to the term in Section 9.2 of this Agreement. 1.11 "Dossiers" means the New Drug Applications pursuant to 21 U.S.C. §355(b)(1)-(2), and all amendments and supplements thereof, for the Products as set forth in Exhibit A. 1.12 "Effective Date" shall have the meaning ascribed to the term in Section 11.1 of this Agreement. 1.13 "ETON Indemnified Parties" shall have the meaning ascribed to the term in Section 13.1 of this Agreement. 1.14 "FDA" means the United States Food and Drug Administration and all divisions under its direct control or any successor organizations. 1.15 "Force Majeure Events" shall have the meaning ascribed
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Extract the exact clause related to "Parties" from the excerpt above.

assistant: Aucta Pharmaceuticals, Inc.