Task: Please create a SMILES based on the description below.
Description: The molecule is the straight-chain keto form of D-fructuronic acid. It derives from a keto-D-fructose. It is a conjugate acid of a keto-D-fructuronate.
Result: O=C(O)[C@@H](O)[C@@H](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#}
O=C(O)[C@@H](O)[C@@H](O)[C@H](O)C(=O)CO
(2S,3S,4S)-2,3,4,6-tetrahydroxy-5-oxohexanoic acid
The molecule is the straight-chain keto form of D-fructuronic acid. It derives from a keto-D-fructose. It is a conjugate acid of a keto-D-fructuronate.