D-Lactal is a dibutyltin oxide that is used in the synthesis of n-acetyllactosamine, disaccharides and trisaccharides. D-Lactal has been shown to have high resistance to chloride ion, which is one of the most common reagents for cleavage. It can also be used as a synthetic precursor for other glycoside derivatives by reacting with triflic acid or trisaccharide. Triflic acid and trisaccharide react with chloride to form a stereoselective glycosidic bond. D-Lactal is also able to bind lectins, carbohydrate chemistry and carbohydrate chemistry reagents.