The molecule is a branched amino tetrasaccharide comprising a beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosamine disaccharide, to the galactosyl residue of which are (1->3)- and (1->6)-linked two N-acetyl-beta-D-glucosamine residues. It has a role as an epitope. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5S,6R)-4-[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-3,5-dihydroxyoxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide