[{"from": "human", "value": "Describe this molecule. [C][C@][Branch2][Ring1][O][C@@H1][Branch2][Ring1][=Branch1][C@H1][Branch1][P][O][C@H1][Ring1][Branch1][N][C][=C][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N][C][O][O][O]"}, {"from": "gpt", "value": "A nucleoside analog with anti-hepatitis C virus (HCV) activity. Upon phosphorylation into its 5-triphosphate form, this metabolite inhibits viral RNA chain elongation and viral RNA-dependent RNA polymerase activity. This blocks viral production of HCV RNA and thus viral replication."}]