The molecule is a branched amino tetrasaccharide comprising N-acetyl-D-galactosamine at the reducing end with a N-acetyl-alpha-D-galactosaminyl-(1->3)-[alpha-L-fucosyl-(1->2)]-beta-D-galactosyl moiety attached at the 3-position. It is an amino tetrasaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5R,6R)-2-[(2R,3R,4S,5S,6R)-2-[(3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-hydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide