[{"from": "human", "value": "Describe this molecule. [C][N][C][=C][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][N][C][=N][Ring1][#Branch2]"}, {"from": "gpt", "value": "The molecule is a 3-methylxanthine tautomer where the imidazole proton is located at the 9-position. It has a role as a metabolite. It is a tautomer of a 3-methyl-7H-xanthine."}]