| 摘要 |
This invention provides new compounds of formula I, <IMAGE> I wherein N IS A WHOLE NUMBER FROM 1 TO 3, R1 is hydrogen, or halogen of atomic number from 9 to 35, EACH OF THE TWO RADICALS R2 are the same, and each is hydrogen or alkyl of 1 to 4 carbon atoms, EACH OF THE TWO RADICALS R3 are the same, and each is hydrogen or alkyl of 1 to 4 carbon atoms, and X is carbonyl or methylene, USEFUL AS ANTI-ARRHYTHMICS.
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