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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event of a transaction (whether this Agreement is actually assigned or is assumed by the acquiring party by operation of law (e.g., in the context of a reverse triangular merger)), unless otherwise agreed with the acquiring party in writing, intellectual property of the acquiring party shall not be included in the intellectual property to which the other Party has access under this Agreement; or (b) to an Affiliate, provided that the assigning Party shall remain liable and responsible to the non‑assigning Party hereto for the performance and observance of all such duties and obligations by such Affiliate. For the avoidance of doubt, in the event that either Party assigns this Agreement pursuant to this Section 14.3(a), the other Party shall have the right to terminate this Agreement pursuant to Section 12.2(i). This Agreement shall be binding upon successors and permitted assigns of the Parties. Any assignment not in accordance with this Section 14.3 will be null and void. 14.4 Severability. If any one or more of the provisions contained in this Agreement is held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby, unless the absence of the invalidated provision(s) adversely affects the substantive rights of the Parties. The Parties shall in such an instance use their best efforts to replace the invalid, illegal or unenforceable provision(s) with valid, legal and enforceable provision(s) which, insofar as practical, implement the purposes of this Agreement. 14.5 Notices. All notices required or permitted hereunder shall be in writing and sufficient if delivered personally, sent by facsimile (and promptly confirmed by personal delivery, registered or certified mail or overnight courier), sent by internationally- recognized 49 US-DOCS\105216871.19 Source: ZOGENIX, INC., 10-Q, 5/9/2019 overnight courier or sent by registered or certified mail, postage prepaid, return receipt requested, addressed as follows: If to Zogenix, addressed to: Zogenix, Inc. 5959 Horton Street, Suite 500 Emeryville, CA 94608, U.S.A Attention: Chief Executive Officer Facsimile Number: +1 (510) 550-8340 With a copy to (which shall not constitute notice): Latham & Watkins, LLP 12670 High Bluff Drive San Diego, CA 92130, U.S.A Attention: Cheston Larson, Esq. Facsimile Number: +1 (858) 523-5450 If to Distributor, addressed to: Nippon Shinyaku Co., Ltd. 14, Nishinosho-monguchi-cho Kisshoin, Minami-ku Kyoto 601-8550, JAPAN Attention: Alliance Department Facsimile Number: +81-75-321-9019 or to such other address as the Party to whom notice is to be given may have furnished to the other Party in writing in accordance herewith. Any such notice shall be deemed to have been given: (a) when delivered if personally delivered or sent by facsimile on a Business Day; and (b) on the second Business Day after dispatch if sent by internationally-recognized overnight courier. 14.6 Entire Agreement; Amendments. This Agreement and the Supply Agreement, together with the exhibits hereto and thereto, contain the entire understanding of the Parties with respect to the subject matter hereof and thereof and supersede and cancel all previous express or implied agreements and understandings, negotiations, writings and commitments, either oral or written, in respect to the subject matter hereof and thereof, including the Confidentiality Agreement. This Agreement may be amended, or any term hereof modified, only by a written instrument duly executed by authorized representatives of both Parties, but "written instrument" does not include the text of e-mails or similar electronic transmissions. 14.7 Headings. The captions to the several Articles and Sections hereof are not a part of this Agreement, but are merely for convenience to assist in locating and reading the several 50 US-DOCS\105216871.19 Source: ZOGENIX, INC., 10-Q, 5/9/2019 Sections hereof. 14.8 Independent Contractors. It is expressly agreed that Zogenix and Distributor shall be independent contractors and that the relationship between the two Parties shall not constitute a partnership, joint venture or agency. Neither Zogenix nor Distributor shall have the authority to make any statements, representations or commitments of any kind or to take any action that shall be binding on the other Party, without the prior written consent of the other Party. 14.9 Waiver. The waiver by either Party hereto of any right hereunder, or the failure of the other Party to perform, or a breach by the other Party, shall not be deemed a waiver of any other right hereunder or of any other breach or failure by such other Party whether of a similar nature or otherwise. 14.10 Cumulative Remedies. No remedy referred to in this Agreement is intended to be exclusive, but each shall be cumulative and
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Extract the exact clause related to "Anti-Assignment" from the excerpt above.

assistant: Any assignment not in accordance with this Section 14.3 will be null and void.