Compounds of the formula ##STR1## wherein n is 1 or 2, R.sub.1 is hydrogen, --CO--R.sub.2 or --SO.sub.2 R.sub.3, R.sub.2 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms or (alkyl of 1 to 4 carbon atoms)amino, and R.sub.3 is alkyl of 1 to 4 carbon atoms, and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as bronchospasmolytics.
式子为##STR1##的化合物,其中n为1或2,R.sub.1为氢、--CO--R.sub.2或--SO.sub.2R.sub.3,R.sub.2为氢、1至4个碳原子的烷基、1至4个碳原子的烷氧基或(1至4个碳原子的烷基)
氨基,R.sub.3为1至4个碳原子的烷基,以及其非毒性、药理学上可接受的酸盐。这些化合物及其盐可用作支气管痉挛解除剂。