Patent No. EP4051265 (titled "Functionalized Peptides As Antiviral Agents") was filed by Enanta Pharmaceuticals on Jul 19, 2021. The application was issued on Aug 20, 2025.
The invention provides a compound of Formula (VI-6a), or its pharmaceutically acceptable salt, characterized by X being a cyano group (-CN) and A being an optionally substituted C1-C8 alkyl or optionally substituted heteroaryl. These compounds act as 3C-Like protease (3CLpro/Mpro) inhibitors, interfering with the processing of viral polyproteins to prevent coronavirus replication. They are intended for treating or preventing coronavirus infections (including alpha, beta, gamma, and delta coronaviruses, specifically SARS-CoV-1, SARS-CoV-2, and MERS-CoV) and associated respiratory disorders. The compounds may be administered as monotherapy or in combination with other antiviral, immunomodulatory, or anti-inflammatory agents via various pharmaceutical compositions, including oral, injectable depot, or rectal/vaginal formulations.
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