Compounds of the formula: ##STR1## wherein: Y is 2,6-dimethylphenyl, 2,5-dimethylphenyl, [5-bromo-2-methylphenyl], or 5-chloro-2-methylphenyl; and X is propyl, isopropyl, n-butyl, or isobutyl; or a non-toxic, pharmaceutically acceptable acid addition salt thereof; possess anti-arrhythmic activity.
式为##STR1##的化合物,其中:Y是2,6-二甲基苯基,2,5-二甲基苯基,[5-
溴-2-甲基苯基]或5-
氯-2-甲基苯基;X是丙基,异丙基,正丁基或异丁基;或其非毒性、药学上可接受的酸加盐;具有抗心律失常活性。