-COOCH: (6)CH, COOH+CH COCH. (8)CH CH2 CH2 CH (9)○CH,CHCH,CH B. Br Br C(CH3)2 (10)CH:CHCHCH CH CH COOH NHCOCH SO:H 2○ 14 5)c,-○coc，cH,-〈-cocH 6o-0-c-○ COCH -OOwa0,m8 子子心 -o-a 发o0