2H O OHC(CH2)CHO (2)Zn/H+ Br -Br-2H5OH (1)O3 2. h (2)Zn/H2O OHC(CH2)3 CHO KOH CH, CHCH, CH2 CH=CH 2 3 (B) CH CH (A) (C) 〉CH (D) 三、推测结构三、推测结构 H2 (1) (2) O3 Ni H + (CH2 ) 4 2 , CHO Zn OHC H2 O CHO Br 2 hv C2 H5 OH Br KOH (1) (2) O3 Zn OHC(CH2 ) 3 CH2 CH2 CH3 CH3 CH CH=CH2 (A) (B) CH3 CH3 CH3 1. 2. 3. (C) (D)