The molecule is an amino tetrasaccharide consisting of a D-GalNAc-(1->3)-[D-GalNAc-(1->4)]-D-GalNAc moiety attached to N-acetyl-D-galactosaminitol via a (1->3)-linkage. It has a role as a carbohydrate allergen.
N-[(3R,4R,5R,6R)-2-[(2R,3S,4R,5R)-5-acetamido-4-[(3R,4R,5R,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[(2S,3R,4S,5R)-2-acetamido-1,4,5,6-tetrahydroxyhexan-3-yl]oxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide