Chemical compounds having an effect on the circulatory system have the formulas ##STR1## or a mixture thereof, or a pharmaceutically suitable acid-addition salt or quaternary salt thereof, wherein R is hydrogen or lower alkyl, R.sup.1 is lower alkyl, phenyl, carboxyl, lower alkoxycarbonyl, nitrile, carbamoyl or carbohydrazido, R.sup.2 is hydrogen or lower alkyl, and wherein the formula I R.sup.2 is hydrogen then R.sup.1 is other than nitrile, alkoxycarbonyl or propyl.
对循环系统产生影响的化合物具有以下公式 ##STR1## 或其混合物,或其药用适宜的酸加成盐或季
铵盐,其中 R 为氢或较低烷基,R.sup.1 为较低烷基,苯基,羧基,较低烷氧基羰基,腈基,
氨基甲酰基或羧
肼基,R.sup.2 为氢或较低烷基,其中在公式 I R.sup.2 为氢时,R.sup.1 不是腈基,氧基羰基或丙基。