The molecule is an oligosaccharide sulfate that is 2-acetamido-2-deoxy-6-O-sulfo-D-galactopyranose in which the hydroxy group at position 3 has been converted into the corresponding 2-O-sulfo-alpha-L-threo-hex-4-enopyranuronoxyl derivative. It is an oligosaccharide sulfate, an amino disaccharide, a monocarboxylic acid, a member of acetamides and an enol.
(2R,3R,4R)-2-[(3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(sulfooxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-3-sulfooxy-3,4-dihydro-2H-pyran-6-carboxylic acid