The molecule is a linear amino trisaccharide comprising an alpha-N-glycoloylneuraminyl residue (2->3)-linked to a beta-D-galactosyl residue, which is in turn linked (1->3) 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)-2-[(2R,3R,4S,5S,6R)-2-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-5-[(2-hydroxyacetyl)amino]-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid