The molecule is an N-propionylated alpha-(2->8)-linked homosialopolysaccharide consisting of five alpha-D-N-propionylneuraminyl residues joined by (2->8) linkages (i.e. [8)-alpha-Neu5Pr-(2->]n where n = 5). It is an [8)-alpha-Neu5Pr-(2->]n and an amino pentasaccharide.
(2R,4S,5R,6R)-6-[(1S,2R)-2-[(2S,4S,5R,6R)-2-carboxy-6-[(1S,2R)-2-[(2S,4S,5R,6R)-2-carboxy-6-[(1S,2R)-2-[(2S,4S,5R,6R)-2-carboxy-6-[(1S,2R)-2-[(2S,4S,5R,6R)-2-carboxy-4-hydroxy-5-(propanoylamino)-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxan-2-yl]oxy-1,3-dihydroxypropyl]-4-hydroxy-5-(propanoylamino)oxan-2-yl]oxy-1,3-dihydroxypropyl]-4-hydroxy-5-(propanoylamino)oxan-2-yl]oxy-1,3-dihydroxypropyl]-4-hydroxy-5-(propanoylamino)oxan-2-yl]oxy-1,3-dihydroxypropyl]-2,4-dihydroxy-5-(propanoylamino)oxane-2-carboxylic acid