7-chloro-2-hydrazino-5-phenyl-3H-1,4-benzodiazepine 、
丙酮酸乙酯 以gives 7-chloro-2-[[1-(ethoxycarbonyl)ethylidene]hydrazino]-5-phenyl-3H-1,4-benzodiazepine as an oily product的产率得到7-chloro-2-[[1-(ethoxycarbonyl)ethylidene]hydrazino]-5-phenyl-3H-1,4-benzodiazepine