[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][Ring1][C][=O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the conjugate base of 2-methyl-3-oxopropanoic acid; major species at pH 7.3. It has a role as a human metabolite. It is a conjugate base of a 2-methyl-3-oxopropanoic acid."}]