The molecule is a branched amino pentasaccharide consisting of three alpha-L-rhamnose residues [linked sequentially (1->3) and (1->2); one at the reducing end] and two N-acetyl beta-D-glucosaminyl residues [one linked (1->3) to the reducing-end rhamnose and the other linked (1->3) to the non-reducing-end rhamnose].
N-[(2S,3R,4R,5S,6R)-2-[(2R,3R,4R,5S,6S)-3-[(2S,3R,4R,5S,6S)-4-[(2S,3R,4R,5S,6S)-4-[(2S,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,5-dihydroxy-6-methyloxan-2-yl]oxy-3,5-dihydroxy-6-methyloxan-2-yl]oxy-2,5-dihydroxy-6-methyloxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide