The molecule is a linear amino trisaccharide comprising an N,9-O-diacetyl-alpha-neuraminyl residue (2->3)-linked to a beta-D-galactosyl residue, which is in turn linked (1->4) to N-acetyl-beta-D-glucosamine. It has a role as an epitope. It is an amino trisaccharide and a glucosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-6-[(1R,2R)-3-acetyloxy-1,2-dihydroxypropyl]-4-hydroxyoxane-2-carboxylic acid