[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@@H1][Branch1][O][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is an optically active form of 4-hydroxy-2-oxopentanoate having 4S-configuration. It is a conjugate base of a (S)-4-hydroxy-2-oxopentanoic acid."}]