| abstract |
Compounds of the formula I <IMAGE> (I), wherein R2 is hydrogen or an organic acid residue; R3 is methyl or ethyl; R4 is hydrogen or methyl; <IMAGE>+TR <IMAGE> wherein R1 is lower alkyl; and <IMAGE> and when R2 is a dibasic acid residue, the physiologically acceptable salts thereof with the free acid moiety of the R2 group, are physiologically active, e.g., are diuretics having aldosterone antagonist effects. |