Task: Please give me a SMILES based on the description below.
Description: The molecule is a ketoaldonic acid that is butyric acid carrying an oxo substituent at position 3 as well as two hydroxy substituents at positions 2 and 4 (the S-enantiomer). It is a ketoaldonic acid, a dihydroxy monocarboxylic acid and a 3-oxo monocarboxylic acid. It derives from a butyric acid. It is a conjugate acid of a (S)-2,4-dihydroxy-3-oxobutanoate. It is an enantiomer of a (R)-2,4-dihydroxy-3-oxobutanoic acid.
Result: O=C(O)[C@@H](O)C(=O)CO
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
(2S)-2,4-dihydroxy-3-oxobutanoicacid
The molecule is a ketoaldonic acid that is butyric acid carrying an oxo substituent at position 3 as well as two hydroxy substituents at positions 2 and 4 (the S-enantiomer). It is a ketoaldonic acid, a dihydroxy monocarboxylic acid and a 3-oxo monocarboxylic acid. It derives from a butyric acid. It is a conjugate acid of a (S)-2,4-dihydroxy-3-oxobutanoate. It is an enantiomer of a (R)-2,4-dihydroxy-3-oxobutanoic acid.