Patent ID: 7589089

Claim:
A compound of formula I wherein R 1 is heteroaryl, which is optionally substituted by halogen, lower alkyl, lower alkoxy, lower alkyl substituted by halogen, lower alkoxy substituted by halogen, cyano, amino, di-lower alkyl amino or morpholinyl; R 2 is —(CH 2 ) n -aryl, or —(CH 2 ) n -heteroaryl wherein the aryl or heteroaryl groups are substituted by one or more substituents selected from the group consisting of halogen, lower alkyl, cyano, and lower alkoxy; R 3 is hydrogen or lower alkyl; R 4 is aryl or heteroaryl, wherein aryl and heteroaryl are optionally substituted by one or more substituents selected from the group consisting of halogen, lower alkyl substituted by halogen, lower alkoxy substituted by halogen, and lower alkyl; X is a bond or —OCH 2 —; and n is 0, 1 or 2; or a pharmaceutically acceptable acid addition salt thereof.