The molecule is an amino tetrasaccharide consisting of N-acetylglucosamine having a fucosyl residue attached at the 4-position via a beta-linkage and alpha-fucosyl-(1->2)-galactosyl residues attached at the 3-position, also via a beta-linkage. It has a role as an epitope and an antigen. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(3R,4R,5S,6R)-4-[(2R,3R,4S,5R,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-2-hydroxy-6-(hydroxymethyl)-5-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]acetamide