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