The molecule is a branched amino pentasaccharide comprising a linear tetrasaccharide chain of alpha-D-galactose, beta-D-galactose, N-acetyl-beta-D-glucosamine and N-acetyl-beta-D-galactosamine residues linked sequentially (1->3), (1->3) and (1->6), to the beta-D-galactose residue of which is also linked (1->2) an alpha-L-fucose residue. It is an amino pentasaccharide, a galactosamine oligosaccharide and a glucosamine oligosaccharide.
N-[(3R,4R,5R,6R)-6-[[(2R,3R,4R,5S,6R)-3-acetamido-5-hydroxy-4-[(2R,3R,4S,5S,6R)-5-hydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-2,4,5-trihydroxyoxan-3-yl]acetamide