[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=C][C@H1][Branch1][O][C][C@@H1][Branch1][=Branch1][C@H1][Ring1][Branch1][C][O][O][N][C][=N][C][=C][Ring1][Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][N]"}, {"from": "gpt", "value": "The molecule is a Hepatitis B Virus Nucleoside Analog Reverse Transcriptase Inhibitor. The mechanism of action of entecavir anhydrous is as a Nucleoside Reverse Transcriptase Inhibitor."}]