The molecule is an amino tetrasaccharide consisting of alpha-fucosyl, N-acetyl-beta-galactosaminyl, N-acetyl-beta-glucosaminyl and alpha-galactose residues joined in a linear sequence. It has a role as an epitope.
N-[(2S,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-4-hydroxy-6-(hydroxymethyl)-2-[(2S,3R,4S,5S,6R)-2,3,5-trihydroxy-6-(hydroxymethyl)oxan-4-yl]oxyoxan-3-yl]acetamide