CH2OH HOCH,O CH2OH H QCH2OH L OH OH OH HO OH OH H CH,OH aD-()吡喃果糖 C=0 aD-()呋喃果糖 HO-H H-OH CH2OH H-OH CH2OH D-()果糖 HOCH2O OH OH H OH HO CH2OH CH2OH OH H B-D-()-吡喃果糖 BD-()呋喃果糖 C=O CH2OH CH2OH H OH H OH HO H O CH2OH H OH H H OH HO H CH2OH OH O CH2OH H OH H H OH HO H CH2OH OH CH2OH OH HOCH2 O H OH H H OH CH2OH HOCH2 O OH H OH H H OH α -D-(-)-吡喃果糖 β-D-(-)-吡喃果糖 α -D-(-)-呋喃果糖 β-D-(-)-呋喃果糖 D-(-)-果糖