The molecule is a linear amino trisaccharide consisting of D-glucose at the reducing end having an N-acetyl-alpha-D-galactosaminyl-(1->3)-beta-D-galactosyl moiety attached at the 4-position. It is an amino trisaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5R,6R)-2-[(2R,3S,4S,5R,6S)-3,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide