The molecule is a branched amino trisaccharide consisting of N-acetyl-beta-D-glucosamine having alpha-L-fucosyl and N-acetyl-beta-D-glucosaminyl residues attached at positions 3 and 4 respectively. It has a role as a carbohydrate allergen.
N-[(2S,3R,4R,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-hydroxy-2-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide