The molecule is a branched amino pentasaccharide comprising an acetylated glucosamine residue, a glucose residue and three rhamnose residues, one of which is at the reducing end.
N-[(2S,3R,4R,5S,6R)-2-[(2S,3R,4R,5R,6S)-4,5-dihydroxy-2-[(2S,3R,4R,5S,6S)-5-hydroxy-6-methyl-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-[(2R,3R,4R,5S,6S)-2,3,5-trihydroxy-6-methyloxan-4-yl]oxyoxan-3-yl]oxy-6-methyloxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide