The molecule is an oligosaccharide phosphate consisting of a linear chain of beta-D-mannose, N-acetyl-beta-D-glucosamine and N-acetyl-D-glucosamine residues all linked (1->4), to the mannose residue of which are also linked (1->3) and (1->6) respectively a 6-O-phosphono-alpha-D-mannosyl-(1->2)-alpha-D-mannosyl disaccharide unit and an alpha-D-mannosyl-(1->3)-[6-O-phosphono-alpha-D-mannosyl-(1->2)-alpha-D-mannosyl-(1->6)]-alpha-D-mannosyl branched tetrasaccharide unit. It is an oligosaccharide phosphate, a glucosamine oligosaccharide and an amino nonasaccharide.
[(2R,3S,4S,5S,6R)-6-[(2S,3S,4S,5S,6R)-2-[[(2R,3R,4S,5S,6S)-6-[[(2R,3R,4S,5S,6S)-6-[(2R,3S,4R,5R,6S)-5-acetamido-6-[(2R,3S,4R,5R)-5-acetamido-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(phosphonooxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,5-dihydroxyoxan-2-yl]methoxy]-3,5-dihydroxy-4-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl dihydrogen phosphate