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