[{"from": "human", "value": "Describe this molecule. [C][N][C][=C][Branch1][=Branch1][N][C][Ring1][Branch1][=O][N][Branch1][=N][C][=Branch1][C][=O][N][Branch1][Branch1][C][Ring1][#Branch2][=O][C][C]"}, {"from": "gpt", "value": "The molecule is an oxopurine in which the purine ring is substituted by oxo groups at positions 2, 6, and 8, and the nitrogens at positions 1, 3, and 7 are substituted by methyl groups. It is a metabolite of caffeine. It has a role as a human xenobiotic metabolite, a human blood serum metabolite, a mouse metabolite and a human urinary metabolite. It is a conjugate acid of a 1,3,7-trimethylurate."}]