Patent ID: 8188079

Claim:
A compound of formula I, wherein X is O or S, R 1 is selected from the group consisting of i) lower alkyl, ii) lower alkyl substituted by 1-5 substituents individually selected from cycloalkyl, halogen, halogen-lower alkoxy and lower alkoxy, and iii) cycloalkyl, R 2 is selected from the group consisting of i) H, ii) lower alkyl, and iii) lower alkyl substituted by 1-5 substituents individually selected from cycloalkyl, halogen, halogen-lower alkoxy, heterocyclyl and lower alkoxy, R 3 is individually selected from the group consisting of i) halogen and ii) lower alkyl, R 4 is individually selected from the group consisting of i) H and ii) lower alkyl, R 5 is individually selected from the group consisting of i) H and ii) lower alkyl, R 6 is individually selected from the group consisting of i) H and ii) lower alkyl, R 7 is individually selected from the group consisting of i) H, ii) aryl, and iii) lower alkyl, and n is 0, 1 or 2, or a pharmaceutically acceptable salt thereof.