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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will be null and void. Except as above limited, this Supply Agreement is binding upon and will inure to the benefit of each of the Parties, its successors and assigns. Without limiting the foregoing, in the event that a Party is acquired, the acquiring Party shall agree in writing to abide by the terms of this Supply Agreement. Sutro agrees that if it assigns the License Agreement to any successor as allowed under section 15.1 of the License Agreement, it will also assign to such successor this Supply Agreement in accordance with this Section 12.4. 12.5 This Supply Agreement incorporates the Exhibits referenced herein. This Supply Agreement, together with the License Agreement, constitutes the entire agreement and supersedes all prior agreements and understandings, both written and oral, between the Parties hereto with respect to its subject matter. To the extent of any conflict between this Agreement and the License Agreement, the License Agreement shall govern and control. 12.6 All notices, requests or other communication provided for or permitted hereunder shall be given in writing and shall be hand delivered or sent by confirmed facsimile, reputable courier or by registered or certified mail, postage prepaid, return receipt requested, to the address set forth below, or to such other address of which either Party may inform the other in writing. Notices will be deemed delivered on the earliest of transmission by facsimile, actual receipt or [***] days after mailing as described herein. If to Sutro: Sutro Biopharma, Inc. 310 Utah Ave., Suite 150 South San Francisco, CA 94080 Attention: Chief Executive Officer If to SutroVax: SutroVax, Inc. 353 Hatch Dr. Foster City, CA 94404 Attention: Chief Executive Officer 12.7 This Supply Agreement may be amended, modified or waived only in a writing signed by the Party or Parties to be bound thereby. 12.8 If any provision of this Supply Agreement shall be held invalid, illegal or unenforceable, such provision shall be enforced to the maximum extent permitted by law and the Parties' fundamental intentions hereunder, and the remaining provisions shall not be affected or impaired. 12.9 Nothing herein contained shall constitute this a joint venture agreement and nothing herein shall constitute any Party as a partner, principal or agent of any other, this being an agreement between independent contracting entities. Except as expressly set forth herein, no Party shall have the authority to bind any other in any respect whatsoever to Third Parties. Except as provided herein, nothing contained in this Supply Agreement shall be construed as conferring any right on any Party to use any name, trade name, trademark or other designation of any other Party hereto, unless the express, written permission of such other Party has been obtained. 12.10 This Supply Agreement has been submitted to the scrutiny of, and has been negotiated by, both Parties and their counsel, and shall be given a fair and reasonable interpretation in accordance with its terms, without consideration or weight being given to any such term's having been drafted by any Party or its counsel. 12.11 This Supply Agreement shall be governed by, and construed and enforced in accordance with, the laws of the State of California, without regard to any conflict of laws rules to the contrary. 12.12 Each Party acknowledges that the other Party may likely suffer irreparable harm from such Party's breach or threatened breach of this Agreement and the other Party, in such cases, would therefore be entitled, without waiving any other right or remedy available to, to injunctive relief (including specific performance) without the requirement to post a bond, provided the waiver by such Party of the other Party's requirement to post a bond shall expire on the Change of Control of the other Party, and each party agrees that the arbitrator selected under Section 11.3 shall have the power to grant such injunctive relief (or order specific performance). The Parties shall comply with any such injunctive relief (including specific performance) ordered by the arbitrator and agree that such order may, to the extent not precluded by applicable law, be enforceable as a final award in any court of competent jurisdiction. 12.13 This Supply Agreement may be executed in two (2) or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Facsimile and other electronically scanned signatures shall have the same effect as their originals. [The remainder of this page is left intentionally blank] IN WITNESS WHEREOF, the Parties have caused this Supply Agreement to
"""

Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.

assistant: Not found.