| 摘要 |
<p>There is provided compounds of formula (I), wherein R?1, R2, R3, R4, R5a, R5b, R6, R9¿, X, A and B have meanings given in the description, which are useful in the prophylaxis and in the treatment of arrhythmias, in particular atrial and ventricular arrhythmias.</p> |
