JPS6019296B

Compounds of the formula wherein A and B, which may be identical to or different from each other, are each straight alkylene of 2 to 4 carbon atoms which may have a methyl or phenyl substituent attached thereto, R1, R2, R3 and R4, which may be identical to or different from each other, are each hydrogen, fluorine, chlorine, bromine, hydroxyl, amino, nitro, acetylamino, alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms or (alkyl of 1 to 3 carbon atoms)thio, R5, R6, R7 and R8, which may be identical to or different from each other, are each hydrogen, alkyl of 1 to 4 carbon atoms, phenyl-(alkyl of 1 to 4 carbon atoms) or methoxyphenyl-(alkyl of 1 to 4 carbon atoms), or R5 and R6, together with each other, are straight alkylene of 2 to 5 carbon atoms, or R7 and R8, together with each other, are straight alkylene of 2 to 5 carbon atoms, and R9 is hydrogen, alkyl of 1 to 6 carbon atoms or phenyl-(alkyl of 1 to 6 carbon atoms), AND NON-TOXIC, PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF; THE COMPOUNDS AS WELL AS THE SALTS ARE USEFUL AS ANTIARRHYTHMICS.