[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is conjugate base of barbituric acid. It is a conjugate base of a barbituric acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][=C][Ring1][Branch2][O-1]"}]