The molecule is a branched amino trisaccharide consisting of two alpha-L-rhamnose residues [linked (1->2); one at the reducing end] with a single N-acetyl beta-D-glucosaminyl residue linked (1->3) to the reducing-end rhamnose.
N-[(2S,3R,4R,5S,6R)-2-[(2R,3R,4R,5S,6S)-2,5-dihydroxy-6-methyl-3-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide