N-Aminoalkyl(aminophenyl)sulfonic acid amides of the formula: ##STR1## in which R.sup.1 is --NH.sub.2, alkylamino of 1 to 3 carbon atoms or alkanoylamino of 2 to 4 carbon atoms, in 3- or 4-position of the benzene ring; R.sup.2 is hydrogen or alkyl of 1 to 4 carbon atoms; R.sup.3 is hydrogen or straight or branched chain alkyl of 1 to 4 carbon atoms; R.sup.4 is straight or branched chain alkyl of 1 to 4 carbon atoms; with the proviso that R.sup.3 and R.sup.4 are branched chain alkyl when R.sup.2 is hydrogen; and n is one of the integers 2, 3 or 4; or a pharmaceutically acceptable salt thereof, an anti-arrhythmic agents useful in the treatment of cardiac arrhythmias and conditions characterized by coronary arteries vasospasm.
式子为:##STR1## 其中R.sup.1为苯环的3-或4-位上的--NH.sub.2,1到3个碳原子的烷基
氨基或2到4个碳原子的酰基
氨基; R.sup.2为氢或1到4个碳原子的烷基; R.sup.3为氢或1到4个碳原子的直链或支链烷基; R.sup.4为1到4个碳原子的直链或支链烷基; 前提是当R.sup.2为氢时,R.sup.3和R.sup.4是支链烷基; n为2、3或4之一的整数; 或其药学上可接受的盐,是治疗心律失常和冠状动脉痉挛症状的
抗心律失常药物。