[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an oxopurine."}, {"from": "gpt", "value": "[C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][N][C][=C][Branch1][S][N][=C][Ring1][Branch1][S][C][C][N][C][C][C][C][C][Ring1][=Branch1][N][Branch1][O][C][=Branch1][C][=O][N][C][Ring2][Ring1][C][=O][C]"}]