| abstract |
Hypotensive activity is exhibited by compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof wherein R 1 is hydrogen or alkyl; n R 2 and R 3 are each independently phenyl, substituted phenyl, cycloalkyl, or R 2 is hydrogen and R 3 is heteroaryl; n R 4 and R 5 are the same or different and each is hydrogen, hydroxy, alkoxy, alkanoyl or alkyl; n R 6 is hydrogen or alkyl; and n n is 1, 2, 3 or 4; with the proviso that if R 2 and R 3 are each phenyl, at least one of R 1 , R 4 , R 5 and R 6 is other than hydrogen. |