The molecule is an amino disaccharide consisting of alpha-L-threo-hex-4-enopyranuronic acid and 2-acetaido-2-deoxy-4,6-di-O-sulfo-beta-D-galactopyranose joined in sequence by a (1->3) glycosidic bond. It is an alpha,beta-unsaturated monocarboxylic acid, an oligosaccharide sulfate, an enol, a member of acetamides and an amino disaccharide.
(2R,3R,4R)-2-[(2R,3R,4R,5R,6R)-3-acetamido-2-hydroxy-5-sulfooxy-6-(sulfooxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxy-3,4-dihydro-2H-pyran-6-carboxylic acid