CH H3C(H2C)3 H3C(H2C)3 COOC?H5 CHO COOH (5) (7) 3 CH3 COOH"- CH2(CO0C2Hsh 答案(1) CH3 CH2OCOCH3 CH2 CH2COOH C C H COOC2H5 H3C(H2C)3 H C C H CHO H3C(H2C)3 H CHO H HO C COOH COOH NH2 O O CH3 CH3 O O O O O O (2) (3) (4) (5) (6) (7) (8) CH3COOH CH2(COOC2H5)2 答案：