The molecule is an amino disaccharide composed of N-acetylneuraminic acid and N-acetyl-alpha-D-galactosamine residues linked (2->6). It has a role as an epitope. It is an amino disaccharide and a galactosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-3,4,6-trihydroxyoxan-2-yl]methoxy]-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid