The molecule is a branched amino tetrasaccharide consisting of N-acetyl-glucosamine at the reducing end with an alpha-fucosyl-(1->2)-alpha-fucosyl group attached at the 3-position and an N-acetyl-beta-glucosaminyl residue attached at the 4-position. It has a role as an epitope. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(2S,3R,4R,5R,6R)-2-[(2R,3S,4R,5R)-5-acetamido-4-[(2S,3S,4R,5S,6S)-4,5-dihydroxy-6-methyl-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-6-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide