SMILES: C1=C(O[C@@H]([C@@H]([C@H]1O)O)O)C(=O)O
Description: The molecule is a hexuronic acid that is 3,4-dihydro-2H-pyran-6-carboxylic acid substituted by a hydroxy group at each of the positions 2, 3, and 4 (the 2S,3R,4S-diastereoisomer). It is a conjugate acid of a 4-deoxy-beta-L-threo-hex-4-enopyranuronate.