The molecule is a branched amino tetrasaccharide comprising N-acetyl-D-galactosamine at the reducing end with an alpha-D-galactosyl-(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-[(3R,4R,5R,6R)-2,5-dihydroxy-4-[(2R,3R,4S,5S,6R)-5-hydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-6-(hydroxymethyl)oxan-3-yl]acetamide