The molecule is an amino trisaccharide consisting of an N-acetyl-D-glucosamine flanked by two D-galactose residues in a linear sequence. It derives from a beta-D-GlcpNAc-(1->3)-D-Galp.
N-[(2S,3R,4R,5S,6R)-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-[(3R,4S,5S,6R)-2,3,5-trihydroxy-6-(hydroxymethyl)oxan-4-yl]oxyoxan-3-yl]acetamide