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 10.9 SUPPLY AGREEMENT between CREMER OLEO GmbH & Co KG, Glockengiesserwall 3, 20095 Hamburg, Germany — hereinafter referred to as Cremer — and Ultragenyx Pharmaceutical Inc, 60 Leveroni Court, Suite 200, Novato, California 94949, United States of America — hereinafter referred to as Ultragenyx — ­ each party also referred to as a "Party" and jointly as the "Parties" - Preamble Whereas, Cremer is a producer of oleo chemical products; Whereas, Ultragenyx is a biotechnology company committed to bringing life-enhancing therapeutics for patients with rare and ultra-rare genetic diseases, also known as orphan diseases, to market; Whereas, the Parties desire that Cremer supplies to Ultragenyx the product Triheptanoin (hereinafter also referred to as the "Product") in bulk form pursuant to the terms and conditions of this Agreement; Whereas, Ultragenyx intends to process the Product into a pharmaceutical product in the meaning of Sec. 2 German Pharmaceuticals Act (Arzneimittelgesetz—AMG) and to market the processed Product in the Field (as defined below) (hereinafter referred to as the "Purpose"); and Whereas, Ultragenyx intends to obtain regulatory approval for the processed Product as a pharmaceutical product in the meaning of Sec. 2 AMG. Now therefore, the Parties hereto agree as follows: Article 1 Supply of Product 1) Subject to the terms and conditions set forth in this Agreement Cremer shall supply Ultragenyx with the Product free from defect and meeting the product specification attached to this Agreement as Annex A (the "Product Specifications"). 2) Cremer shall supply Ultragenyx exclusively with the Product worldwide. The aforesaid exclusivity is limited to [***] (collectively, the "Field"). Cremer may supply the Product to other customers outside of the Field. 3) Ultragenyx shall purchase the Product exclusively from Cremer. [***] Certain information in this document has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions. 1 Article 2 Orders and Delivery 1) The Product will be ordered by Ultragenyx through purchase orders. Purchase orders shall be submitted in any written or electronic form or by facsimile, setting out the quantity of Product required and the date for delivery. Cremer shall give its order confirmation in writing stating the quantity and Price (as defined below). Cremer shall not be obliged to deliver the Product in the absence of a written order confirmation given to Ultragenyx. 2) Delivery of the Product in bulk form by Cremer shall be EXW (Incoterms 2010), unless otherwise agreed in writing by the Parties. 3) Within [***] days of execution of this Agreement, Cremer shall deliver to Ultragenyx the Master Batch Record for the Product for Ultragenyx to review. 4) All Product shall be delivered with the applicable certificate of analysis and batch records for the Product delivered and an invoice for the quantity of Product delivered. 5) If Ultragenyx obtains regulatory approval for the processed Product, the Parties shall enter into a separate commercial supply agreement for the Product that sets forth the forecasting and ordering mechanism for commercial supply of the Product, enablement of the manufacturing process in the event of a failure to supply, the term of such commercial supply agreement and other customary terms and conditions. Article 3 Prices and payment 1) The prices payable by Ultragenyx to Cremer for the Product (the "Price") shall be agreed [***] every contract year; provided, that the Price may not increase more than the [***] for such period or [***]%, whichever is higher. At the date of signing the Parties agree on a Price of €[***] per kilogram for the Product. 2) If the parties cannot agree on a price for the Product by the beginning of a following contract year, Cremer may refuse to deliver the Product to Ultragenyx until the Parties agreed on a respective price. 3) Payments shall be made by Ultragenyx in Euro and within [***] days after receipt of a proper invoice. 4) Transfer of title with respect to any Product shall be subject to full payment and settlement of all claims Cremer may have against Ultragenyx in connection with the execution of this Agreement. Article 4 Specification; Warranties; Cremer's Liability; Indemnification 1) The Parties assume that the Product constitutes an active pharmaceutical ingredient in the meaning of Sec. 4 para. 19 AMG. Ultragenyx shall process the Product into a pharmaceutical product in the meaning of Sec. 2 AMG and market the processed Product as a pharmaceutical product in the meaning of Sec 2 AMG and to perform clinical trials. Cremer does not participate in the
"""

Extract the exact clause related to "Price Restrictions" from the excerpt above.

assistant: The prices payable by Ultragenyx to Cremer for the Product (the "Price") shall be agreed [***] every contract year; provided, that the Price may not increase more than the [***] for such period or [***]%, whichever is higher.