[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch1][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion that is the conjugate base of 5-oxo-2,5-dihydro-2-furylacetic acid, formed via deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a 5-oxo-2,5-dihydro-2-furylacetic acid."}]