Task: Please generate a molecule SMILES based on the text description below.
Description: The molecule is a butan-4-olide that is dihydrofuran-2-one substituted at C-3 and C-4 by hydroxy groups (the 3S,4R-diastereomer). It is a diol and a butan-4-olide. It is an enantiomer of a L-threonolactone.
Result: O=C1OC[C@@H](O)[C@@H]1O
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
O=C1OC[C@@H](O)[C@@H]1O
(3S,4R)-3,4-dihydroxyoxolan-2-one
The molecule is a butan-4-olide that is dihydrofuran-2-one substituted at C-3 and C-4 by hydroxy groups (the 3S,4R-diastereomer). It is a diol and a butan-4-olide. It is an enantiomer of a L-threonolactone.