The molecule is an amino trisaccharide consisting of N-acetyl-alpha-D-glucosamine, beta-D-galactose and N-acetyl-D-galactosamine residues linked sequentially (1->4) and (1->3). It has a role as an epitope. It is a glucosamine oligosaccharide, a galactosamine oligosaccharide and an amino trisaccharide.
N-[(2R,3R,4R,5S,6R)-2-[(2R,3R,4R,5R,6R)-6-[(3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide