The molecule is a branched amino hexasaccharide comprising a linear tetrasaccharide chain consisting of alpha-neuraminic acid, beta-D-galactose, N-acetyl-D-glucosamine, and N-acetyl-D-galactosamine residues, linked sequentially (2->3), (1->4), and (1->6), with an alpha-L-fucosyl residue linked (1->3) to the N-acetyl-D-glucosamine residue and a D-galactose residue linked (1->3) to the reducing-end N-acetyl-D-glucosamine residue. It has a role as an epitope. It is an amino hexasaccharide, a galactosamine oligosaccharide, a member of N-acetylneuraminic acids and a glucosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-[[(2R,3R,4R,5R)-5-acetamido-3,6-dihydroxy-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-2-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-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