[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an oxopurine. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][N][C][=N][C][=C][Ring1][Branch1][C][=Branch1][C][=N][N][Branch1][=Branch2][C][=Branch1][C][=O][N][Ring1][Branch2][C][C]"}]