The molecule is an amino heptasaccharide consisting of two N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannose disaccharide units linked (1->3) and (1->6) to the mannose residue of a beta-D-mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-beta-D-glucosamine trisaccharide. The anomer of beta-D-GlcpNAc-(1->2)-alpha-D-Manp-(1->3)-[beta-D-GlcpNAc-(1->2)-alpha-D-Manp-(1->6)]-beta-D-Manp-(1->4)-beta-GlcpNAc-(1->4)-D-GlcpNAc in which the configuration at the anomeric centre of the reducing-end N-acetyl-D-glucosamine residue is beta. It has a role as an epitope.
N-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4R,5S,6R)-3-acetamido-5-[(2S,3S,4S,5R,6R)-4-[(2S,3S,4S,5S,6R)-3-[(2S,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[[(2S,3S,4S,5S,6R)-3-[(2S,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-3,5-dihydroxyoxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide