[{"from": "human", "value": "Provide a brief overview of this molecule. [C][S][C][C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is conjugate base of 5-methylthio-2-oxopentanoic acid. It is a conjugate base of a 5-methylthio-2-oxopentanoic acid."}]