The molecule is a dimeric branched amino tetrasaccharide consisting of 6-O-sulfo-beta-D-glucosyl-(1->3)-N-acetyl-beta-D-galactosamine, having a further 6-O-sulfo-beta-D-glucosyl-(1->3)-N-acetyl-beta-D-galactosaminyl moiety attached at the 6-position of the galactosamine. It is an oligosaccharide sulfate and an amino tetrasaccharide. It is a conjugate acid of a 6-O-sulfonato-beta-D-glucosyl-(1->3)-[6-O-sulfonato-beta-D-glucosyl-(1->3)-N-acetyl-beta-D-galactosaminyl-(1->6)]-N-acetyl-beta-D-galactosamine(2-).
[(2R,3S,4S,5R,6R)-6-[(2R,3R,4R,5R,6R)-3-acetamido-2-[[(2R,3R,4R,5R,6R)-5-acetamido-3,6-dihydroxy-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(sulfooxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl hydrogen sulfate