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Other names | PF-00868554 |
Routes of administration | Oral |
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Formula | C29H37N5O3 |
Molar mass | 503.647 g·mol−1 |
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Filibuvir (also known as PF-00868554, PF-868554) was a non-nucleoside orally available[1] NS5B inhibitor developed by Pfizer for the treatment of hepatitis C. It binds to the non-catalytic Thumb II allosteric pocket of NS5B viral polymerase and causes a decrease in viral RNA synthesis. It is a potent and selective inhibitor, with a mean IC50 of 0.019 μM against genotype 1 polymerases.[2] Several filibuvir-resistant mutations have been identified, M423 being the most common that occurred after filibuvir monotherapy.[3] It was intended to be taken twice-daily.[4]
Its investigation was discontinued in February 2013 due to strategic reasons.[5][6]