Patent ID: 6867205

Claim:
A compound of formula (I) wherein X is N; R 1 and R 2 are independently hydrogen or lower alkyl; R 3 is heterocyclyl; heterocyclyl mono-, di-, or tri-substituted, independently, by lower alkyl, lower alkoxy, perfluoro-lower alkyl, amino or halogen; aryl; or aryl mono-, di-, or tri-substituted, independently, by halogen, lower alkyl, lower alkoxy, amino or perfluoro-lower alkyl; R 4 is lower alkyl; ethoxy, propoxy, isoproproxy, butoxy, isobutoxy or hexyloxy; lower alkylthio; heterocyclyl; heterocyclyl mono-, di-, or tri-substituted, independently, by lower alkyl, lower alkoxy, perfluoro-lower alkyl, amino or halogen; aryl; aryl mono-, di-, or tri-substituted, independently, by lower alkyl, lower alkoxy, halogen, amino, or perfluoro-lower alkyl; aryloxy lower alkyl or cycloalkyl; R 5 is hydrogen or lower alkyl; or a pharmaceutically acceptable salts thereof.