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:
"""
the Product, a fraction (i) the numerator of which is the number of units of such SKU of the Product shipped from the Specialty Pharmacies or the Retail Pharmacies to patients based on prescriptions written by the Specialty in the Territory (as determined by data reported pursuant to agreements between Dova (or its Affiliates) and the Specialty Pharmacies or the data aggregators, applicable), and (ii) the denominator of which is the number of units of such SKU of the Product shipped from the Specialty Pharmacies or the Retail Pharmacies to all patients in the Territory (namely based on prescriptions written by the Specialty and outside the Specialty) (as determined by data reported pursuant to agreements between Dova (or its Affiliates) and the Specialty Pharmacies or the data aggregators, as applicable). 1.58 "Specialty Pharmacy Net Sales" shall mean, for each SKU of the Product: 7 CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PORTIONS OF THIS EXHIBIT. THE COPY FILED HEREWITH OMITS THE INFORMATION SUBJECT TO A CONFIDENTIALITY REQUEST. OMISSIONS ARE DESIGNATED [***]. A COMPLETE VERSION OF THIS EXHIBIT HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. Source: DOVA PHARMACEUTICALS INC., 10-Q, 11/8/2018 (i) the number of units of such SKU of the Product shipped from the Specialty Pharmacies to all patients based on prescriptions written by the Specialty in the Territory during an applicable period (as determined by data reported pursuant to agreements between Dova (or its Affiliates) and the Specialty Pharmacies or the data aggregators, as applicable); and MULTIPLIED BY (ii) the applicable WAC for such SKU of the Product for the applicable period, MULTIPLIED BY (iii) the Gross to Net Fraction for such SKU of the Product for the applicable period. 1.59 "Specialty Pharmacy" shall mean those specialty pharmacies to which Dova (or its Affiliates) sells and/or ships units of Product during the Term and for which Dova or its Affiliates have agreements with that include data provisions or provide for separate data agreements which enables Dova to track shipments of Product from such Specialty Pharmacy to patients based on the Target Professional prescribing such Product. 1.60 "Tail Period" shall mean the period commencing on the day after the last day of the Term and ending on the earlier of (i) [***] and (ii) [***], unless terminated early pursuant to Section 2.3.1(a) of the Agreement. 1.61 "Target Professionals" shall mean physicians, nurse practitioners, physician assistants and any other medical professionals in the Territory with prescribing authority (as authorized under Applicable Law) in the Territory for the Product. 1.62 "Term" shall have the meaning set forth in Section 12.1. 1.63 "Territory" shall mean the United States of America and its territories and possessions. 1.64 "Third Party(ies)" shall mean any person or entity other than Dova and Valeant and their respective Affiliates. 1.65 "Third Party Agreements" shall mean the agreements described on Schedule 1.65 hereto. 1.66 "Valeant Activities" shall mean any and all promotional activities (including Detailing) conducted by Valeant to encourage the appropriate use of the Product in the Specialty in the Field in the Territory in accordance with the terms of this Agreement. 1.67 "Valeant Property" shall have the meaning set forth in Section 8.1.1. 1.68 "WAC" shall mean, for each SKU of the Product, Dova's list price for a unit of the SKU of the Product to wholesalers or direct purchasers in the Territory, as reported in wholesale price guides or other nationally recognized publications of drug pricing data. ARTICLE 2 RIGHTS AND OBLIGATIONS 2.1 Engagement; Grant of Rights. During the Term, subject to the terms and conditions of this Agreement, Dova hereby grants to Valeant the right, on a co-exclusive basis (solely with Dova and its Affiliates), to Detail and promote the Product in the Specialty in the Territory in the Field, and to conduct the Valeant Activities and the activities of the institutional account management team (pursuant to and subject to the terms of Section 4.1.5) for the Product in the Territory in the Field in accordance with the terms and conditions of this Agreement. Notwithstanding the foregoing, Dova retains and reserves the right for Dova and its Affiliates to promote the Product in the Territory including in the Specialty. Valeant shall have no other rights relating to the Product, except as specifically set forth in this Agreement and, without limiting the foregoing, except as set out in Section 4.1.5, if agreed upon, Valeant shall have no right to, and shall not, conduct the Valeant Activities for the Product outside the Specialty or outside the
"""

Extract the exact clause related to "Rofr/Rofo/Rofn" from the excerpt above.