barley sugar beet sugar cellulose clinical dextran deoxyribose dextran dextrose erythrose fructose galactose glucose glycogen grape sugar hydroxy aldehyde hydroxy ketone lactose levulose lyxose maple sugar molasses monosaccharide nipa sugar pentose sugar polysaccharide polysaccharose raffinose saccharide starch sucrose sugar tree molasses trisaccharide