The molecule is an amino trisaccharide consisting of alpha-L-fucopyranose, beta-D-galactopyranose and N-acetyl-D-galactopyranosamine residues joined in sequence with a (1->2)- and a (1->3)-linkage, respectively.
N-[(3R,4R,5R,6R)-4-[(2R,3R,4S,5R,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-2,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide