The molecule is a branched amino trisaccharide comprising an N -acetyl-alpha-D-galactosamine residue at the reducing end, to which are (1->3)- and (1->6)-linked two N -acetyl-alpha-D-glucosamine residues. It has a role as an epitope. It is an amino trisaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5S,6R)-2-[[(2R,3R,4R,5R,6S)-5-acetamido-4-[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,6-dihydroxyoxan-2-yl]methoxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide