The molecule is a branched hexasaccharide corresponding to the complete inner core of the lipopolysaccharide mutant 44/76(Mu-4) of Neisseria meningitidis. It is an oligosaccharide phosphate and an amino hexasaccharide.
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-5-[(2R,3S,4R,5R,6R)-4-[(2R,3S,4S,5R,6R)-3-[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4-[2-aminoethoxy(hydroxy)phosphoryl]oxy-6-[(1S)-1,2-dihydroxyethyl]-5-hydroxyoxan-2-yl]oxy-6-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-2-hydroxyoxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylic acid