Ombitasvir (CAS 1258226-87-7) is a next-generation NS5A inhibitor featuring a fused bicyclic naphthyridine core linked to a substituted piperazine moiety via an amide bond. Its structure incorporates a 4-aminophenyl ether side chain and a 2-aminothiazole subunit, conferring high target specificity. As the parent drug, it directly mediates antiviral activity through NS5A replication complex inhibition. This compound serves as an HPLC reference standard for quantification in fixed-dose combination therapies.
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