The molecule is a branched amino pentasaccharide consisting of beta-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->3)-N-acetyl-alpha-D-galactosamine in which the galactosyl residue at the non-reducing end has alpha-sialyl and N-acetyl-beta-D-glucosaminyl residues attached via glycosidic linkages at positions 3 and 4 respectively. It is an amino pentasaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4R,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-[(2S,3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-5-[(2S,3R,4R,5R,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid