The molecule is a branched pentasaccharide consisting of a trisaccharide chain of alpha-D-galactose, beta-D-galactose and beta-D-glucose residues linked sequentially (1->3) and (1->4), with alpha-L-fucosyl residues attached by (1->2) and (1->3) linkages to the beta-D-galactose and beta-D-glucose residues respectively. It derives from an alpha-L-Fucp-(1->3)-[alpha-L-Fucp-(1->2)-beta-D-Galp-(1->4)]-beta-D-Glcp.
(2S,3S,4R,5S,6S)-2-[(2R,3R,4R,5R,6R)-2,3-dihydroxy-5-[(2S,3R,4S,5S,6R)-5-hydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-6-(hydroxymethyl)oxan-4-yl]oxy-6-methyloxane-3,4,5-triol