The molecule is an amino trisaccharide consisting of alpha-L-fucopyranose, beta-D-galactopyranose and 2-amino-2-deoxypyranose joined in sequence by (1->2) and (1->3) glycosidic bonds. It is an amino trisaccharide and a primary amino compound. It derives from a beta-D-Galp-(1->3)-beta-D-GlcpN and an alpha-L-Fucp-(1->2)-beta-D-Galp.
(2S,3S,4R,5S,6S)-2-[(2R,3R,4S,5R,6R)-2-[(2R,3R,4R,5S,6R)-3-amino-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-methyloxane-3,4,5-triol