| abstract |
The invention provides compounds of the formula:n wherein each of R 1 , R 2 and R 3 , which can be the same or different is hydrogen, chloro, bromo, fluoro, methyl, ethyl, methoxv, amino, hydroxy or nitro; R 4 is hydrogen or alkyl of 1 to 7 carbon atoms; X isn (R 5 is hydrogen or hydroxy) and n is 1-4; and their non-toxic pharmaceutically acceptable acid addition salts. These compounds exhibitvaluable pharmacological activity and are useful in the treatment of mammals, especially as anti- hypertensive agents. Furthermore, some of the compounds have proved to possess diuretic, ß-blocking activity and/or antithrombotic activity. The compounds may be made by a variety of methods and may be incorporated in pharmaceutical compositions also comprising a compatible pharmaceutically acceptable carrier. |