Compounds are provided having the structure ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and are hydrogen, lower alkyl, lower alkenyl, or hydroxy-lower alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached also form a heterocyclic radical which may contain another heteroatom, namely nitrogen, oxygen or sulfur; R.sup.3 and R.sup.4 may be the same or different and are hydrogen or lower alkyl. These compounds are useful in the treatment or arrhythmia. In addition, novel intermediates are provided having the structure ##STR2## wherein R is hydrogen, benzyl or ##STR3## These intermediates are also useful in treating acute myocardial infarction.
提供具有结构##STR1##的化合物,其中R.sup.1和R.sup.2可以相同或不同,可以是氢、低烷基、低烯基或羟基低烷基,或者R.sup.1和R.sup.2与它们连接的氮原子一起形成一个杂环基团,该杂环基团可以包含另一个杂原子,即氮、氧或
硫;R.sup.3和R.sup.4可以相同或不同,可以是氢或低烷基。这些化合物在心律失常的治疗中有用。此外,提供了具有结构##STR2##的新型中间体,其中R是氢、苄基或##STR3##这些中间体在治疗急性心肌梗死方面也有用。