果糖(fructose) 己酮糖 'CH2OH OH C=O 60 0 37 0 HO-C-H HO-C-H HO -H 41 OH H-C-OH H-C-OH H OH H-c-OH H-C-OH OH CH>OH CH2OPO3H2 HOH,C CH2OH OH OH D-果糖 6-磷酸果糖 OHD-果糖 CH2OH C C C C CH2OH O HO H H OH H OH 1 2 3 4 5 6 CH2OH C C C C CH2OPO3H2 O HO H H OH H OH 6-磷酸果糖 CH2OH C C C C CH2OPO3H2 O HO H H OH H OH