The molecule is an amino tetrasaccharide in which a galactose residue is linked beta(1->3) to the residue at the reducing end of a linear chain of one galactose residue, one N-acetylglucosamine residue and one N-acetylgalactosamine residue, sequentially linked beta(1->4) and beta(1->6). It has a role as an epitope. It is a galactosamine oligosaccharide, an amino tetrasaccharide, a glucosamine oligosaccharide and a beta-D-Galp-(1->3)-[beta-D-Galp-(1->4)-beta-D-GlcpNAc-(1->6)]-D-GalpNAc.
N-[(2R,3R,4R,5S,6R)-2-[[(2R,3R,4R,5R,6S)-5-acetamido-3,6-dihydroxy-4-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]acetamide