[{"from": "human", "value": "Could you provide a description of this molecule? [C][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]"}, {"from": "gpt", "value": "The molecule is a nucleoside inhibitor 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."}]