| abstract |
Compounds represented by the following general formula (I):n wherein R 1 represents a hydrogen atom, a hydroxy group, a lower alkyl group or a lower alkoxy group, R 2 represents a hydrogen atom, a benzoyl group orn n R 3 represents a hydroxy group, a lower alkoxy group, -NHOH orn R 5 represents a hydrogen atom or a halogen atom, R 6 and R 7 , which may be the same or different, each represents a hydrogen atom or a lower alkyl group, and Z represents a C 1 to C 3 straight or branched alkylene group, provided that when R 3 represents a hydroxy group or a lower alkoxy group, R 2 represents nwith said lower alkyl group and lower alkoxy group containing 1 to 6 carbon atoms. Process for their preparation, and hypotensives containing the compounds as major compo- |