Patent ID: 7022718

Claim:
A compound of formula (I) wherein X is C—R 5 ; 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; lower alkoxy; 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 salt thereof.