The molecule is an amino pentasaccharide comprised of a tetrasaccharide chain of beta-D-galactosyl, N-acetyl-alpha-D-galactosaminyl, beta-D-galactosyl and N-acetyl-D-glucosaminyl residues linked sequentially (1->3), (1->3) and (1->4), with an alpha-L-fucosyl residue linked (1->2) to the galactosyl residue proximal to the reducing-end glucosaminyl residue. It has a role as an epitope. It is an amino pentasaccharide, a galactosamine oligosaccharide and a glucosamine oligosaccharide.
N-[(3R,4R,5S,6R)-5-[(2S,3R,4S,5S,6R)-4-[(2R,3R,4R,5R,6R)-3-acetamido-5-hydroxy-6-(hydroxymethyl)-4-[(2R,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