| 摘要 |
A compound of the formula <IMAGE> (I) wherein R1 and R6 independently represent hydroxy, C1-C4-alkoxy, substituted C1-C4- alkoxy, amino, or substituted amino, R2 represents hydrogen, C1-C4-alkyl, or C2-C4-alkenyl, R3 represents cyclo-C3-C6-alkyl, phenyl, phenyl substituted by C1-C4-alkyl, halogen, nitro, or C1-C4-alkoxy, or cyclo-C3-C6-alkyl fused with benzene, or wherein R2 and R3 are connected and together with the adjacent -CH-group and the adjacent N-atom form a saturated or partially saturated, monocyclic, five- or six-membered heterocyclic group or form a saturated or partially saturated, bicyclic heterocyclic group containing five or six atoms per ring, R4 represents hydrogen or C1-C4-alkyl, and R5 represents an acyl group, are useful as antihypertensive and cardioactive agents. The invention also relates to processes for preparing the compounds of the formula I and to pharmaceutical compositions.
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