The molecule is an N-acetylated alpha-(2->8)-linked homosialopolysaccharide consisting of eight alpha-D-N-acetylneuraminyl residues joined by (2->8) linkages (i.e. [8)-alpha-Neu5Ac-(2->]n where n = 8). It is an [8)-alpha-Neu5Ac-(2->]n and an amino octasaccharide.
(2R,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-6-[(1S,2R)-2-[(2S,4S,5R,6R)-5-acetamido-2-carboxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2-carboxy-4-hydroxyoxan-2-yl]oxy-1,3-dihydroxypropyl]-2,4-dihydroxyoxane-2-carboxylic acid