The molecule is a branched amino tetrasaccharide that consists of the linear trisaccharide alpha-L-fucosyl-(1->3)-N-acetyl-beta-D-galactosaminyl-(1->4)-N-acetyl-D-glucosamine in which an alpha-L-fucosyl residue is attached at position 3 of the glucoamine. It has a role as an epitope. It is an amino tetrasaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide.
N-[(3R,4R,5S,6R)-5-[(2S,3R,4R,5R,6R)-3-acetamido-5-hydroxy-6-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-2-hydroxy-6-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]acetamide