The molecule is a glycosylfucose consisting of beta-D-galactopyranose and alpha-L-fucopyranose residues joined in sequence by a (1->4) glycosidic bond. It derives from a beta-D-galactose and an alpha-L-fucose.
(2R,3S,4S,5S,6S)-6-methyl-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxane-2,3,4-triol