The molecule is a branched amino heptasaccharide comprising N-acetyl-alpha-D-galactosamine, beta-D-galactose, N-acetyl-beta-D-galactosamine, alpha-D-galactose, beta-D-galactose and D-glucose residues linked sequentially (1->3), (1->3), (1->3), (1->4) and (1->4), to the beta-D-galactose residue nearest to the non-reducing end is also linked (1->2) an alpha-L-fucose residue. It is an amino heptasaccharide and a galactosamine oligosaccharide.
N-[(2R,3R,4R,5R,6R)-2-[(2R,3R,4S,5S,6R)-2-[(2S,3R,4R,5R,6R)-3-acetamido-2-[(2R,3R,4S,5S,6R)-2-[(2R,3R,4R,5R,6S)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-hydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide