[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of hexacosanedioic acid; major species at pH 7.3. It is a conjugate base of a hexacosanedioic acid."}, {"from": "gpt", "value": "[C][Branch2][Ring1][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]