Patent ID: 8088920

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: R 1 is selected from the group consisting of: (1) cycloalkyl, which is unsubstituted or substituted by hydroxy or lower hydroxyalkyl, and (2) —CH 2 —CR 9 R 10 -cycloalkyl, wherein R 9 is hydrogen or lower alkyl, and R 10 is hydrogen or hydroxy; R 2 is hydrogen; R 3 is selected from the group consisting of: (1) lower cycloalkylalkyl, (2) lower alkoxyalkyl, (3) lower halogenalkyl, (4) lower heteroarylalkyl, wherein the heteroaryl group is unsubstituted or substituted once or twice by lower alkyl, and (5) phenyl, which is unsubstituted or substituted once or twice by halogen; R 4 and R 8 independently from each other are hydrogen or halogen; and R 5 , R 6 and R 7 independently from each other are selected from the group consisting of: (1) hydrogen, (2) lower alkyl, (3) lower alkoxy, (4) halogen, (5) lower halogenalkyl, (6) lower halogenalkoxy, (7) lower alkylsulfonylamino, and (8) cyano.