This book describes the incorporation of 2-[4-oxadiazolo, imidazo, benzimidazo, thiadiazolo, isoxazolo, and pyrazolo] derivatives on to the 1,4-benzodiazepine nucleus through phenoxyl/ phenylamino spacer from the corresponding amidine, imidate ester, Это и многое другое вы найдете в книге Five-membered derivatives of 1,4-benzodiazepine (Navjeet Kaur)