CHO 2 H OH CH,OH HO ≡40H 旋转C4-C5 OH CHO H OH 2 H OH H OH CH,OH 6 CH,OH ch,oh O9 H HOH a-D)葡萄糖 OH H OH 0 OH H CHO CH,OH OH H OH β-D(+)-葡萄糖 ONH H H oHCHO OH OH OH CH 2OH HO H H H H 1 2 3 4 5 6 CH 2OH CHO H H OH OHOH H H OH 6 5 4 3 2 1 旋转C4 －C5 OH CHO CH 2OH H H OHOH H H OH 6 5 4 3 2 1 O CH 2OH H H OHOH H H OH H OH O CH 2OH H H OHOH H H OH OH H α-D-(+)-葡萄糖 β-D-(+)-葡萄糖