[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a dicarboxylic acid dianion resulting from deprotonation of both carboxy groups of 3-isopropylmalic acid. It is functionally related to a succinate(2-). It is a conjugate base of a 3-isopropylmalic acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][C][=Branch1][C][=O][O-1]"}]