[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch1][#C][C][=C][Branch1][=Branch1][O][C][Ring1][=Branch1][=O][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained via deprotonation of both carboxy groups of 2-oxo-2H-pyran-4,6-dicarboxylic acid; major species at pH 7.3. It is a conjugate base of a 2-oxo-2H-pyran-4,6-dicarboxylic acid."}]