Glyceraldehydes: Model compounds of monosaccharides C O CH2 O H H C O H HO C H CH2 O H H H O C C O CH2 OH H C OH HO H C CH2 OH H H O C H C OH OH C H D-Glyceraldehyde L-Glyceraldehyde D-Erythrose L-ThreoseGlyceraldehydes: Model compounds of monosaccharides C O CH2 O H H C O H HO C H CH2 O H H H O C C O CH2 OH H C OH HO H C CH2 OH H H O C H C OH OH C H D-Glyceraldehyde L-Glyceraldehyde D-Erythrose L-Threose