Bicyclic compounds, their production and use

Abstract From the Canadian patent

New bicyclic compounds of the formula: (I), wherein R1 and R2 are the same or different and each represents hydrogen hydroxyl or lower alkoxy, R3 is hydrogen or lower alkyl R4 is hydrogen, lower, alkyl, amino-lower-alkyl or acylamino-lower-alkyl R5 is hydrogen) lower alkyl, or aralkyl which may be substituted R6 is hydroxyl, lower alkoxy, amino or lower alkylamino, and m and n are each 1 or 2 and salts thereof are disclosed. The compounds (I) exhibit inhibitory activity of angiotensin converting enzyme and bradykinin decomposing enzyme, and are useful as antihypertensive agents.