The molecule is an amino trisaccharide consisting of two D-galactose residues and an N-acetyl-D-galactosamine residue (at the reducing end) in a linear sequence. It is an amino trisaccharide and a galactosamine oligosaccharide.
N-[(3R,4R,5R,6R)-5-[(2S,3R,4R,5R,6R)-3,4-dihydroxy-6-(hydroxymethyl)-5-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide