| abstract |
Compounds which have the general formula (I> <IMAGE> wherein R is hydrogen, lower alkanoyl or <IMAGE> m is 1 or 2; n is 0 or 1; R1 is hydrogen or lower alkyl; R2 and R'2 each is hydrogen or halogen; R3 is hydrogen, lower alkyl or CF3, and also halogen when n is 1; R4 is hydrogen, lower alkyl or trifluoromethyl; R6 is hydrogen, and also halogen when m is 1; at least one of R2, R'2, R3, R4 and R6 being halogen or CF3 as represented by the symbols and only R2 and R'2 can both be halogen at the same time, and basic salts thereof may be used as hypotensive agents. |