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