The molecule is an amino tetrasaccharide consisting of alpha-L-fucose, beta-D-galactose, N-acetyl-alpha-D-galactosamine and alpha-D-galactose residues joined in sequence with (1->2)-, (1->3)- and (1->3)-linkages, respectively. It has a role as an epitope. It is an amino tetrasaccharide and a galactosamine oligosaccharide. It derives from a beta-D-Galp-(1->3)-beta-D-GalpNAc-(1->3)-alpha-D-Galp.
N-[(2S,3R,4R,5R,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-5-hydroxy-6-(hydroxymethyl)-2-[(2S,3R,4S,5S,6R)-2,3,5-trihydroxy-6-(hydroxymethyl)oxan-4-yl]oxyoxan-3-yl]acetamide