[{"from": "human", "value": "Provide a description of this molecule. [C][=N][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][=Branch1][C][=S][N][=C][N][Ring1][Branch2]"}, {"from": "gpt", "value": "The molecule is a Nucleoside Metabolic Inhibitor. The mechanism of action of mercaptopurine anhydrous is as a Nucleic Acid Synthesis Inhibitor."}]