The molecule is a branched amino tetrasaccharide with a structure consisting of an alpha-galactosyl-(1->3)-beta-galactosyl-(1->4)-N-acetylglucosamine backbone, to the subterminal galactose of which is alpha(1->2)-linked a fucosyl residue. It has a role as an epitope. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(3R,4R,5S,6R)-2,4-dihydroxy-5-[(2S,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-3-yl]acetamide