Compounds of formula ##STR1## in which hal represents halogen; R represents hydrogen or lower alkyl having 1 to 6 carbon atoms; R.sup.2 represents a subsituted or unsubstituted monocyclic heterocyclic group; and X represents oxygen or sulphur; or a pharmaceutically acceptable acid addition or quaternary ammonium salt thereof, are disclosed which have hypotensive and/or antihypertensive activity.
本发明涉及一种化合物,其
化学式为##STR1## 其中hal代表卤素; R代表氢或具有1至6个碳原子的低级烷基; R.sup.2代表取代或未取代的单环杂环基团; X代表氧或
硫;或其药学上可接受的酸加合物或季
铵盐,其具有降压和/或抗高血压活性。