[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is dicarboxylate anion of 2-(acetamidomethylidene)succinic acid; major species at pH 7.3. It is a conjugate base of a 2-(acetamidomethylidene)succinic acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][/C][=C][Branch1][#Branch1][/C][C][=Branch1][C][=O][O-1][\\C][=Branch1][C][=O][O-1]"}]