想？想 CH3CH=CHCHO-CH3CH-CHCHO OH OH OC2H5 CH3CH-CHCHO 2C2H;OH CH3一CH=CH一CH 干燥HCI OC2H5 0C2H5 KMnO:CH3-CH-CH-CH H20 H+ CH3CH-CHCHO OH OH OH OC2Hs OHOHCH3 CH CHCHO CH3 CH CHCHO OH OH 2C2H5OH 干燥HCl CH3 CH CH CH OC2H5 OC2H5 KMnO4 OH- CH3 CH CH CH OC2H5 OH OH OC2H5 H2O H+ CH3 CH CHCHO OH OH 想一想 ？ CH3 CH CHCHO