The invention relates to compounds of formula (I), R.sub.1 and R.sub.2, each independently of the other, are selected from lower alkyl that is unsubstituted or substituted by one or more fluorine atoms which are not linked to the carbon atom of R.sub.1 or R.sub.2 bonding the nitrogen; from lower alkenyl wherein the double bond does not originate from the carbon atom that is bonded to a nitrogen bonding R.sub.1 or R.sub.2 ; from lower alkynyl wherein the triple bond does not originate from the carbon atom that is bonded to a nitrogen bonding R.sub.1 or R.sub.2 ; from cycloalkyl; and from cycloalkyl-lower alkyl; with the proviso that not more than one of the two radicals R.sub.1 and R.sub.2 is methyl; or salts thereof. The mentioned compounds are pharmacologically active against disorders that are responsive to a recuction in intracellular polyamines, such as tumours or protozoal diseases.
本发明涉及式(I)的化合物,其中R.sub.1和R.sub.2各自独立地选择自未被取代或被一个或多个
氟原子取代的低烷基,所述
氟原子未连接到R.sub.1或R.sub.2的碳原子上;来自低烯基,其中双键不起源于与R.sub.1或R.sub.2键合的氮原子上的碳原子;来自低炔基,其中三键不起源于与R.sub.1或R.sub.2键合的氮原子上的碳原子;来自环烷基;和来自环烷基-低烷基;但是两个基团R.sub.1和R.sub.2中不超过一个是甲基;或其盐。所述化合物在对响应于细胞内
多胺减少的疾病,如肿瘤或原虫病等具有药理活性。