The molecule is an amino tetrasaccharide in which an alpha-L-fucosyl residue is linked (1->2) to the middle galactosyl residue of an N-acetyl-alpha-D-galactosaminyl-(1->4)-beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosamine trisaccharide. It has a role as an epitope. It is a galactosamine oligosaccharide, a glucosamine oligosaccharide and an amino tetrasaccharide.
N-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6R)-5-[(2R,3R,4R,5R,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide