| 摘要 |
Compounds having the general formula (I) wherein X1 and X2, which may be identical or different, represent hydrogen, a lower alkyl radical, a lower alkoxy radical, halogen or a trifluoromethyl radical, or form together an alkylendioxy rest. R3 is a lower alkyl radical, a lower alkenyl radical, a lower cycloalkyl radical or a heterocyclanyl radical having 5, 6 or 7 links. R4 is hydrogen, a lower alkyl radical or the acyl rest of an organic carboxylic acid; or R3 and R4 form together the alkylene rest of a nitrogen-containing heterocycle which may comprise another hetero atom. n is 1,2 or 3 and n' is 0 or 1. The compounds are in a racemic form or in an optically active form. A process for their preparation is also disclosed. The compounds of the general formula I are used as pharmaceutical compositions for the treatment of hypertensive troubles. |
