11-(2-chloro-propionyl)-5,11-dihydro-benzo[e]pyrido[3,2-b][1,4]diazepin-6-one 、
N-甲基哌嗪 以to obtain a 49% yield of 5,11-dihydro-11-[2-(4-methyl-1-piperazinyl)-propionyl]-6-H-pyrido-[2,3-b][1,4]-benzodiazepine-6-one which melted at 223°-224° C.的产率得到5,11-dihydro-11-[2-(4-methyl-1-piperazinyl)-propionyl]-6H-pyrido[2,3-b][1,4]-benzodiazepine-6-one