[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch1][C][C][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the monocarboxylic acid anion formed from 3-oxo-4-methylpentanoic acid; principal microspecies at pH 7.3. It is a conjugate base of a 4-methyl-3-oxopentanoic acid."}]