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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of the calendar year end, but in no event shall the difference paid be greater than the minimum amount in Section 6.3.2. 6.3.4 For payments under Section 6.3, ETON shall pay Aucta royalty payments under Section 6.3.1 or 6.3.2 only, but not under both sections concurrently. 6.3.5 If ETON is unable or limited in its ability to sell the Products due to supply chain (e.g., manufacturing, API, etc.) or regulatory issues, that extend for a period of thirty (30) days or more, the minimum royalty payment under Section 6.3.2 shall be adjusted to prorate the annual minimum to account for the period of inability to supply; provided, however, that the minimum royalty payment shall be paid if the inability or limitation of sales by ETON is directly and solely due to ETON's gross negligence or willful misconduct. 6.3.6 [ * * * ] 6.3.7 Within thirty (30) days following the end of each Calendar Quarter following the first commercial sale of the Product in the Territory, including the first and last payment period which may be of a shorter duration (each, a "Payment Period"), ETON shall: (a) compute and report to Aucta in a mutually acceptable format the Net Sales for each Product sold in the Territory during the Payment Period, and (b) pay to Aucta the appropriate royalty payment under Section 6.3 within thirty (30) days of the delivery of the report. 6.4 [ * * * ] 6.5 Interim and Final True-Ups. During the Term, on an annual basis, following the first (1st) calendar year from launch of Product and on a Product-by-Product basis, ETON shall perform an interim "true-up" reconciliation and shall provide Aucta with a written report of such outlining the deductions specified in the definition of Net Sales. The reconciliation shall be based on actual cash paid or credits issued or accrued in accordance with GAAP and company practices consistently applied, including any amounts irrevocably committed but not yet paid at the end of the preceding calendar year. If the foregoing reconciliation report shows either an underpayment or an overpayment between the Parties, the Party owing payment to the other Party shall pay the amount of the difference to the other Party within thirty (30) days after the date of delivery of such report. In addition, within twenty-five (25) months after the termination or expiration of the Term and on a Product-by-Product basis, ETON shall perform a final "true-up" reconciliation and shall provide Aucta with a written report of such outlining the deductions specified in the definition of Net Sales. If the foregoing reconciliation report shows either an underpayment or an overpayment between the Parties, the Party owing payment to the other Party shall pay the amount of the difference to the other Party within thirty (30) days after the date of delivery of such report. 8 Source: ETON PHARMACEUTICALS, INC., 10-Q, 11/14/2019 CONFIDENTIAL 6.6 Taxes. Each Party shall be responsible for and shall pay all Taxes payable on any income earned or received by it during the Term. Where required by law, ETON shall have the right to withhold applicable Taxes from any payments to be made hereunder by ETON to Aucta. Any Tax, duty or other levy paid or required to be withheld by ETON on account of any payments payable to Aucta under this Agreement shall be deducted from the amount of payments due to Aucta. ETON shall secure and promptly send to Aucta proof of such Taxes, duties or other levies withheld and paid by ETON for the benefit of Aucta. Each Party agrees to cooperate with the other Party in claiming exemptions from such deductions or withholdings under any agreement or treaty from time to time in effect. 6.7 Audits. Each Party shall permit an independent certified public accounting firm selected by the auditing Party and reasonably acceptable to the non-auditing Party, that has agreed to be bound by a confidentiality agreement reasonably acceptable to the Parties, to have access, during normal business hours and upon reasonable prior notice (not more often than once in any calendar year), to those books and records maintained by the non-auditing Party necessary for the auditing Party to verify the accuracy of the non-auditing Party's calculations under this Section 6 and/or cost of Product(s) for any period ending not more than two (2) years prior to the date of such request, subject to any limitations in scope necessary to comply with Applicable Law, Third Party confidentiality restrictions, or maintain legal privilege, including but not
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Extract the exact clause related to "Post-Termination Services" from the excerpt above.

assistant: In addition, within twenty-five (25) months after the termination or expiration of the Term and on a Product-by-Product basis, ETON shall perform a final "true-up" reconciliation and shall provide Aucta with a written report of such outlining the deductions specified in the definition of Net Sales.