The molecule is a branched amino tetrasaccharide consisting of beta-D-glucose at the reducing end having an N-acetyl-alpha-D-galactosaminyl-(1->3)-[alpha-L-fucosyl-(1->2)]-beta-D-galactosyl moiety attached at the 4-position. It has a role as an epitope. It is an amino tetrasaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5R,6R)-4,5-dihydroxy-2-[(2R,3S,4S,5R,6S)-3-hydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-5-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-4-yl]oxy-6-(hydroxymethyl)oxan-3-yl]acetamide