[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dicarboxylic acid dianion obtained by removal of a proton from both of the carboxylic acid groups of 3-(acetamidomethylidene)-2-(hydroxymethyl)succinic acid. It is functionally related to a succinate(2-). It is a conjugate base of a 3-(acetamidomethylidene)-2-(hydroxymethyl)succinic acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][/C][=C][Branch1][O][/C][Branch1][Ring1][C][O][C][=Branch1][C][=O][O-1][\\C][=Branch1][C][=O][O-1]"}]