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