The molecule is a branched amino octasaccharide consisting of a linear hexasaccharide chain of alpha-D-galactose, N-acetyl-beta-D-glucosamine, beta-D-galactose, beta-D-glucose, L-glycero-alpha-D-manno-heptose (Hep) and 3-deoxy-D-manno-oct-2-ulose (Kdo) residues linked in a (1->4), (1->3), (1->4), (1->4), (1->5) sequence, to the Hep residue of which is linked (1->3) an N-acetyl-alpha-D-glucosaminyl-(1->2)-L-glycero-alpha-D-manno-heptosyl side-chain. lpt3 mutant of the core oligosaccharide of Neisseria meningitidis.
(4R,5R,6R)-5-[(2S,3S,4R,5R,6R)-4-[(2R,3S,4S,5S,6R)-3-[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[(1S)-1,2-dihydroxyethyl]-4,5-dihydroxyoxan-2-yl]oxy-5-[(2S,3R,4R,5S,6R)-5-[(2S,3R,4S,5S,6R)-4-[(2S,3R,4R,5S,6R)-3-acetamido-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[(1S)-1,2-dihydroxyethyl]-3-hydroxyoxan-2-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-2,4-dihydroxyoxane-2-carboxylic acid