The molecule is a branched amino tetrasaccharide consisting of a linear trisaccharide derivative of alpha-L-fucose, N-acetyl-beta-D-glucosamine and (at the reducing end) alpha-D-mannose residues linked sequentially (1->4) and (1->2), to the N-acetyl-beta-D-glucosamine residue of which is also linked (1->3) a beta-D-galactose residue. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(2S,3R,4R,5S,6R)-6-(hydroxymethyl)-2-[(2S,3S,4S,5S,6R)-2,4,5-trihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-5-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]acetamide