The molecule is a branched amino tetrasaccharide consisting of a beta-D-galactose residue (1->3)-linked to the reducing-end GalNAc residue of a linear chain of beta-D-galactose, N-acetyl-beta-D-glucosamine and N-acetyl-D-galactosamine residues linked (1->4) and (1->6) respectively. It has a role as an epitope. It is an amino tetrasaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5S,6R)-2-[[(2R,3R,4R,5R)-5-acetamido-3,6-dihydroxy-4-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]acetamide