Piperazine derivatives having the formula (I) ##STR1## wherein R.sub.1 is C.sub.1-5 alkyl group which can have a phenyl, trimethoxyphenyl, phenoxy, methoxy-cyclohexyl or heptamethyleneimino substituent on the terminal carbon atom, allyl, phenyl which can have one or more halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, trihalomethyl or allyl substituents, or C.sub.2-5 alkoxycarbonyl; R.sub.2 is hydrogen or C.sub.1-4 alkyl; and R.sub.3 is furyl or a C.sub.5-6 cycloalkyl having a C.sub.1-4 alkoxy substituent, and acid addition salts or quaternary salts thereof with anti-arrhythmic and coronary dilatating pharmaceutical effects.
具有以下式子(I)的
哌嗪衍
生物 ##STR1## 其中R.sub.1是C.sub.1-5烷基,可以在末端碳原子上具有苯基,三
甲氧基苯基,苯氧基,甲氧基环己基或
七亚甲基亚胺取代基,烯丙基,苯基,可以具有一个或多个卤素,C.sub.1-4烷基,C.sub.1-4烷氧基,三卤甲基或烯丙基取代基,或C.sub.2-5烷氧羰基; R.sub.2是氢或C.sub.1-4烷基; R.sub.3是
呋喃基或具有C.sub.1-4烷氧基取代基的C.sub.5-6环烷基,以及其与抗心律失常和冠状动脉扩张药物效应有关的酸盐或季
铵盐。