The molecule is a linear amino pentasaccharide consisting of the tetrasaccharide beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->3)-beta-D-galactosyl-(1->4)-N-acetyl-D-glucosamine having an alpha-N-acetylneuraminyl residue attached at the 3-position of the galactosyl residue at the non-reducing end. It is an amino pentasaccharide and a glucosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6S)-5-acetamido-6-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R)-5-acetamido-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-2-(hydroxymethyl)oxan-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