| 摘要 |
<p>The invention provides compounds of the formula: <CHEM> wherein each of R1, R2 and R3, which can be the same or different, is hydrogen, chloro, bromo, fluoro, methyl, ethyl, methoxy, amino, hydroxy or nitro; R4 is hydrogen or alkyl of 1 to 7 carbon atoms; and n is 0-3; and their non-toxic pharmaceutically acceptable acid addition salts. These compounds exhibit valuable pharmacological activity and are useful in the treatment of mammals, e.g. as anti-hypertensive, beta -blocking and anti-thrombotic agents. Furthermore the compounds have remarkable antimicrobial 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.</p> |
