3-[2-(5-t-Butoxycarbonylaminopentanoylamino)acetylamino]-3(S)-pyridin-3-yl-propionic acid ethyl ester 、
盐酸1,4-二恶烷 反应 18.0h,
以to provide 24-4 as a pale yellow gum which的产率得到3-[2-(5-Aminopentanoylarnino)-acetylamino]-3(S)-pyridin-3-yl-propionic acid ethyl ester dihydrochloride