02N0 12. ONO2 13 CH-CONH2 14 HO CHCH:NHCH(CH)2 15. OH HO 16.H:N- SO2NH- 17. NHCH ·HC CONHz CH, 19. CHCH CHCOOH CH; CH: 20,HOCH,CH,CH,COONa 445存;\ a CH，口)NH f\卡人 14. rz 16. HZN-0-…-() 17. • HCl 18αn 9JtCE刊〉?:COOH 20, HOCH2CHzCH2COONa 445