The molecule is a branched amino pentasaccharide consisting of an alpha-D-Gal residue at the reducing end having an alpha-L-Fuc-(1->3)-beta-D-GalNAc-(1->4)-[alpha-L-Fuc-(1->3)]-beta-D-GlcNAc moiety attached at the 3-position. It has a role as an epitope.
N-[(2S,3R,4R,5R,6R)-2-[(2R,3S,4R,5R,6S)-5-acetamido-2-(hydroxymethyl)-6-[(2S,3R,4S,5S,6R)-2,3,5-trihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]acetamide