FIELD: organic chemistry, pharmacology.
SUBSTANCE: invention relates to compounds of formula I 
,
where R(1), R(2), R(3), R(4), R(5), R(6), R(7), R(8), R(30), and R(31) are disclosed in claims. Compound of present invention are particularly useful as new antiarrythmia bioactive substances, in particular for treatment and prophylaxis of atrial arrhythmia (e.g., atrial fibrillation or auricular flutter).
EFFECT: higher efficiency.
13 cl, 18 ex, 1 tbl
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