[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "The molecule is the (S)-enantiomer of 2-hydroxy-4-methylpentanoic acid. Derived from the metabolism of the branched-chain amino acids, it belongs to the 2-hydroxycarboxylic acid group of amino acid metabolites. It is a 2-hydroxy-4-methylvaleric acid and a (2S)-2-hydroxy monocarboxylic acid. It is an enantiomer of a (R)-2-hydroxy-4-methylpentanoic acid."}]