Patent No. EP4331607 (titled "Pharmaceutical Composition Containing 2-{4-[N-(5,6-Diphenylpyrazin-2-Yl)-N-Isopropylamino]Butyloxy}-N-(Methylsulfonyl)Acetamide") was filed by Nippon Shinyaku on Dec 1, 2016. The application was issued on Apr 30, 2025.

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