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.
(2S,3R,4S)-2,3,4-trihydroxy-3,4-dihydro-2H-pyran-6-carboxylic acid