Benzoxadiazoles and benzothiadiazoles, their preparation and pharmaceutical compositions containing them
 Compounds of formula I, ##STR1## wherein X is oxygen or sulphur, and R.sub.1 -R.sub.6 are various substituents. The compounds are useful for treating coronary insufficiency, intermittent claudication, cerebrovascular insults, spasms in muscles and hypertension. 
Sandoz Ltd.
C A C A
C07D A61K C07D A61K
inventional inventional inventional inventional
Peter
Neumann