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