The molecule is an amino trisaccharide consisting of N-acetyl-alpha-neuraminyl, beta-D-galactosyl and 6-sulfated N-acetyl-beta-D-gluosamine residues linked sequentially (2->3) and (1->4). It has a role as an epitope. It is a glucosamine oligosaccharide, an amino trisaccharide and an oligosaccharide sulfate.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-4,6-dihydroxy-2-(sulfooxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid