| abstract |
A compound of formula (I) or its salts or pharmaceutically acceptable derivatives thereof wherein; A represents a chemical moiety with the general formula (II); X and Y are independently selected from a group consisting of CH 2 , CH(R 5 ) or C(R 5 )(R 6 ); R 1 is selected from the group consisting of optionally substituted arylalkyl, and optionally substituted heteroarylalkyl; R 2 is selected from the group consisting of optionally substituted aryl or optionally substituted heteroaryl or NR 7 R 8 ; R 3 is selected from the group consisting of hydrogen, halogen, hydroxyl, alkoxy, aryloxy, optionally substituted alkyl, optionally substituted amino, optionally substituted amino sulfonyl or nitrile; R 4 is selected from the group consisting of hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted heterocycloalkyl, optionally substituted acyl, optionally substituted sulfonyl, optionally substituted sulfamoyl, optionally substituted aryl, optionally substituted arylalkyl, and optionally substituted heteroaryl; R 5 and R 6 for each occurrence is optionally substituted alkyl; R 7 and R 8 are the same or different and each represents hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted arylalkyl, optionally substituted aryl or optionally substituted heteroaryl; n = 0, 1, 2 or 3; o = 0, 1 or 2 with the proviso that when o = 0, n is 1, 2 or 3 and when o = 1, n is 1 or 2 is provided. Pharmaceutical compositions comprising the compounds are also provided. These compounds are useful in the treatment of various disorders including arrhythmia. |