| abstract |
Antiarrhythmic agents of the formula:-n and their pharmaceutically acceptable salts, nwherein R and R¹, which are the same or different, are C₁-C₄ alkyl, C₃-C₇ cycloalkyl, -CH₂CF₃, -CH₂Cl, -CF₃ or -NH₂; nR² and R³, which are the same or different , are H, halo, CF₃, C₁-C₄ alkyl or C₁-C₄ alkoxy; nand X is -CH₂-, - - n n or -CH(OH)-. |