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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supply Product to SCIEN in the Territory with a minimum expiry of 6 months from the date of shipment. B. The price that SCIEN will pay for Product under this Agreement is the Transfer Price, CIF. Taxes, duties, and other expenses to be paid by SCIEN. C. SCIEN shall pay HEMISPHERX for each order of Product within 75 days after receipt of the goods except for the for first purchase order which will be for 50 vials of Interferon alfa-n3 (human leukocyte derived) ("First Order") and paid once the MOH approves the use for Interferon alfa-n3 (human leukocyte derived) on 5 MERS patients. All purchase orders are final. D. SCIEN will ensure all necessary QA testing / approval for use occurs in the Territory and that each Product is stored under the conditions stipulated in a Quality Agreement (QA) to be executed and appended to this Agreement as Exhibit 4. E. Forecasts, Orders, Payment, and Delivery. Direct Access/EAP Distribution Following the signing of this Agreement, SCIEN will start a full and comprehensive market analysis of the potential of each Product for Direct Access/ EAP distribution. This will be from a market potential and willingness to pay point of view and will be completed within 3 months of the signature of this Agreement. A forecast will then be provided for Product for Direct Access/ EAP distribution and this will be added as a supplement to the Business Plan (Exhibit 3). {***} Confidential portions of this exhibit have been redacted and filed separately with the Commission pursuant to a confidential treatment request in accordance with Rule 24b-2 of the Securities Exchange Act of 1934, as amended. Page 3 of 28 RAA Distribution Six (6) months prior to the estimated regulatory approval for commercial sale of Product in each country in the Territory: 1. SCIEN will provide HEMISPHERX a rolling 12-month forecast of the estimated sales of Product Units, the first 3 months of which will be firm and the second three (3) months of which cannot vary by more than 25% when these become the first three (3) months. This forecast will be updated at 3-month intervals thereafter. 2. In accordance with this forecast, SCIEN agrees to order Product from HEMISPHERX under this Agreement by submitting to HEMISPHERX written purchase orders specifying the quantity, packaging, delivery dates, and delivery location. 3. HEMISPHERX shall manufacture Product as described in the purchase order from SCIEN and HEMISPHERX shall make all shipments to the location specified on SCIEN's purchase order as follows: 4. Hemispherx shall pack, mark and ship Products in accordance with temperature thermometer specifications for the drug product. Hemispherx shall package Products so as to prevent damage or deterioration and shall comply with all applicable temperature and packaging laws. Unless otherwise stipulated, Products shall be packaged, marked, crated and otherwise prepared in accordance with HEMISPHERX's current packaging and crating practices, and good commercial practices. 5. SCIEN will prominently display on all Product that the Product is a product of HEMISPHERX and be so noted and on a visible surface thereof and/or on tags, labels, manuals, and other materials with which Product is sold, the fact that the Product is manufactured and supplied to SCIEN by HEMISPHERX for use and/or sale in the Territory shall be clearly displayed. F. If, for any reason, at any time, HEMISPHERX shall be unable, or should reasonably anticipate being unable to deliver any part or all of the ordered Product in accordance with the terms hereof or the accompanying purchase order, HEMISPHERX shall notify SCIEN of such inability at the earliest possible time (but no later than five (5) workings after HEMISPHERX becomes aware of this their inability to supply Product, whereupon HEMISPHERX and SCIEN will devise a plan to manage the situation. G. HEMISPHERX warrants that the Product (i) shall conform to the specifications set out in the SCIEN purchase order for Product and (ii) shall meet all, if any, reasonably applicable regulatory requirements in the Territory once Product is approved. In the Direct Access/ EAP setting, the Product that HEMISPHERX supplies must confirm with all manufacturing and regulatory requirements (including labelling) for the country in which said Product is intended to be sold. SCIEN's acceptance of the Product shall relieve HEMISPHERX from the obligations arising from this warranty H. SCIEN shall have the right to return and demand replacement of any Product which violates this warranty. I. HEMISPHERX and/or SCIEN shall have the right to cancel, without further obligation to the other party, one or more
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Extract the exact clause related to "Covenant Not To Sue" from the excerpt above.