The molecule is a seven-membered branched galactosamine oligosaccharide that consists of a branched tetrasaccharide unit alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-[alpha-L-Fuc-(1->3)]-beta-D-GlcNAc, attached by a glycosidic linkage to position 6 of the GalNAc residue of the trisaccharide alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->3)-D-GalNAc. It has a role as an epitope. It is a galactosamine oligosaccharide and a glucosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-[[(2R,3R,4R,5R)-5-acetamido-4-[(2R,3R,4S,5S,6R)-4-[(2S,4S,5R,6R)-5-acetamido-2-carboxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxan-2-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,6-dihydroxyoxan-2-yl]methoxy]-2-(hydroxymethyl)-4-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid