[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch1][C][C][C@@H1][Branch2][Ring1][=N][C][=Branch1][C][=O][O][C@@H1][C][C@H1][Branch1][#Branch1][O][C@H1][Ring1][Branch1][C][O][N][C][=C][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N][N]"}, {"from": "gpt", "value": "The molecule is an orally active prodrug of torcitabine (L-deoxycytidine), a nucleoside analog with activity against hepatitis B virus. Torcitabine is modified in vivo to its triphosphate form and acts as a competitive inhibitor of viral DNA polymerase."}]