[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@@H1][Branch1][Ring1][C][=O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is 2-Methyl-3-oxopropanoate with S configuration at the chiral centre. It is a conjugate base of a (S)-methylmalonaldehydic acid. It is an enantiomer of a (R)-methylmalonate semialdehyde."}]