0 0 0 0 CH3C-CH2COC2Hs CH3C-CH2-COC2Hs 成酮分解 成酸分解 CCCOCC 00 00 0 00 CHaCCH2COC.Hs NaOH H →2CH3COOH+C2HsOH 4 00 00 0 CHCCH,coco ccoCllsCcooCcoc OH 0 →CH,Co0+CH,C0C,H,oI耳2CH,CooH+C,H0H