[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a dicarboxylic acid dianion obtained by the deprotonation of both the carboxy groups of pimelic acid. It is a dicarboxylic acid dianion and a pimelate. It is a conjugate base of a pimelate(1-)."}, {"from": "gpt", "value": "[C][Branch1][Branch2][C][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1]"}]