| abstract |
Novel pharmacologically active compounds have been prepared which have the general formulas: WHEREIN R1 is selected from the group consisting of hydrogen and (lower)alkyl; R2 is selected from the group consisting of phenyl, halophenyl and (lower)alkylphenyl; alkylphenyl; R3 is selected from the group consisting of phenyl, halophenyl, (lower)alkylphenyl, pyridyl, amino, anilino, hydrazino, benzylidenehydrazino, halobenzylidenehydrazino, nitrobenzylidenehydrazino and (lower) alkylbenzylidenehydrazino; R4 is (lower)alkyl; and the pharmaceutically acceptable salts thereof. |