[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an oxopurine."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][C][Ring1][Branch2][Branch1][=Branch2][N][C][=Branch1][C][=O][N][Ring1][N][C]"}]