14. CH:ONOz CHONO: CH,ONO COONa CH, CH-COOH 16. CHCH:CH:N CH3 CH-COOH CH, 1.CH C-COOC2Hs CH, CH2OH H-C-OH 19. HO OH 20. ICH2 CHa Cl 49114. CHz ONOz CHONOz CHz ONOz 15dhr ::;λ0'((1-1 16. CI-( ~ U clc HH --ce OO OO HH C3 O C OH FU--C!|C H-H o f c 产-- I! 18. CH3-N X\d 'HCl 、一 汇均 19. O 11 20. CICHzCHz NCNHCHzCHzCl NO 491