[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=Branch2][Ring2][O][=C][Branch2][Ring2][=Branch1][C][=C][Ring1][=Branch1][/C][=C][/C][=Branch1][C][=O][O][C@H1][Branch2][Ring1][C][C@H1][Branch1][=C][C@@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O][C][=Branch1][C][=O][O-1][O][O]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion resulting from the removal of a proton from both of the carboxy groups of 2-O-caffeoylglucaric acid; major species at pH 7.3. It is a dicarboxylic acid dianion and a carbohydrate acid derivative anion. It is a conjugate base of a 2-O-caffeoylglucaric acid."}]