The molecule is a dimeric branched amino tetrasaccharide consisting of beta-D-glucuronosyl-(1->3)-N-acetyl-beta-D-galactosamine having a further beta-D-glucuronosyl-(1->3)-N-acetyl-beta-D-galactosaminyl moiety attached at the 6-position of the galactosamine. It is a galactosamine oligosaccharide and an amino tetrasaccharide.
(2S,3S,4S,5R,6R)-6-[(2R,3R,4R,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6R)-3-acetamido-4-[(2R,3R,4S,5S,6S)-6-carboxy-3,4,5-trihydroxyoxan-2-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-3,6-dihydroxyoxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid