The molecule is a disaccharide derivative comprising two N-acetyl-alpha-D-glucosamine residues linked (1->3), with a 6-aminopentylphospho group linked to each O-6 and with the anomeric carbon at the reducing end linked (1->2) to the O-2 of D-glyceric acid.
(2R)-2-[(2R,3R,4R,5S,6R)-3-acetamido-4-[(2S,3R,4R,5S,6R)-3-acetamido-6-[[5-aminopentoxy(hydroxy)phosphoryl]oxymethyl]-4,5-dihydroxyoxan-2-yl]oxy-6-[[5-aminopentoxy(hydroxy)phosphoryl]oxymethyl]-5-hydroxyoxan-2-yl]oxy-3-hydroxypropanoic acid