[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][O][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is an oxo dicarboxylic acid dianion resulting from deprotonation of both carboxy groups of 4-hydroxy-4-methyl-2-oxoglutaric acid; major species at pH 7.3. It is a conjugate base of a 4-hydroxy-4-methyl-2-oxoglutaric acid."}]