| abstract |
The invention provides compounds of the formula: ##STR1## wherein R 1 , R 2 and R 3 , which can be the same or different, are each hydrogen, chloro, bromo, fluoro, methyl, ethyl, methoxy, amino, hydroxy or nitro; R 4 is hydrogen or alkyl of 1 to 7 carbon atoms; --X-- is ##STR2## R 5 is hydrogen, hydroxy or --OR 6 ; and R 6 is alkyl of 1 to 7 carbon atoms or aryl of 6 to 10 carbon atoms; and their non-toxic pharmaceutically acceptable acid addition salts and mixtures thereof. Processes for the preparation and use of the subject compounds are described, as are novel pharmaceutical compositions comprising at least one of the subject compounds or their salts. The compounds and their non-toxic salts exhibit valuable pharmacological activity and are useful in the treatment of mammals, e.g., as anti-ulcer or anti-hypertensive agents. Furthermore, they are useful as diuretic, sedative, analgesic, anti-inflammatory and tranquilizing agents. |