[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a 3-oxo monocarboxylic acid that is butanoic acid in which the hydrogens at position 2 are replaced by an acetyl and a hydroxy group (the S enantiomer). It is a 3-oxo monocarboxylic acid, a hydroxy monocarboxylic acid and a tertiary alpha-hydroxy ketone. It is functionally related to a butyric acid. It is a conjugate acid of a (S)-2-acetyl-2-hydroxybutanoate."}, {"from": "gpt", "value": "[C][C][C@][Branch1][=Branch1][C][=Branch1][C][=O][C][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}]