Fisher projections H OH H OH H OH HO H C C C C C C H 2OH H O H OH H OH O HO H C C C C C H OH 2 C H OH 2 1 2 3 4 5 6 D-glucose (an aldohexose) D-fructose (an ketohexose) 1 2 3 4 5 6Fisher projections H OH H OH H OH HO H C C C C C C H 2OH H O H OH H OH O HO H C C C C C H OH 2 C H OH 2 1 2 3 4 5 6 D-glucose (an aldohexose) D-fructose (an ketohexose) 1 2 3 4 5 6