The molecule is an amino tetrasaccharide consisting of a 6-O-[(2-aminoethoxy)(hydroxy)phosphoryl-alpha-D-mannopyranosyl residue, two alpha-D-mannopyranosyl residues, and a 2-amino-alpha-D-glucose residue linked together in sequence by (1->2), (1->6) and (1->4) glycosidic bonds. It is an oligosaccharide phosphate and an amino tetrasaccharide.
[(2R,3S,4S,5S,6R)-6-[(2S,3S,4S,5S,6R)-2-[[(2R,3S,4S,5S,6R)-6-[(2R,3S,4R,5R,6S)-5-amino-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methoxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl 2-aminoethyl hydrogen phosphate