The molecule is a branched amino trisaccharide in which two N-acetyl-alpha-neuraminyl residues are linked (2->3) and (2->6) to an N-acetyl-alpha-D-galactosamine residue. It has a role as an epitope. It is an amino trisaccharide and a galactosamine oligosaccharide.
(2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-4-[(2S,4S,5R,6R)-5-acetamido-2-carboxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxan-2-yl]oxy-3,6-dihydroxyoxan-2-yl]methoxy]-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid