The molecule is a disaccharide that is alpha-L-galactopyranose in which the hydroxy group at position 2 has been converted into the corresponding alpha-L-fucopyranoside It is a glycoside and a glycosylgalactose. It derives from an alpha-L-fucose and an alpha-L-galactose.
(2R,3S,4R,5S,6S)-6-methyl-3-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxane-2,4,5-triol