The molecule is a disaccharide that is D-glucopyranose in which the hydroxy group at position 2 has been converted into the corresponding alpha-D-galactopyranoside. It is an alpha-D-galactoside and a glycosylglucose. It derives from a D-glucopyranose.
(3R,4S,5S,6R)-6-(hydroxymethyl)-3-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxane-2,4,5-triol