The molecule is a branched amino pentasaccharide comprised of a linear chain of beta-D-galactose, N-acetyl-beta-D-galactosamine, beta-D-galactose and N-acetyl-beta-D-glucosamine residues linked sequentially (1->4), (1->3) and (1->4), with an alpha-L-fucosyl residue linked (1->2) to the galactose residue proximal to the reducing-end N-acetylglucosamine residue. It is an amino pentasaccharide and a glucosamine oligosaccharide.
N-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5S,6R)-4-[(2S,3R,4R,5R,6R)-3-acetamido-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-5-hydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide