Patent ID: 7781593

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof, wherein: (a) R 1 is selected from the group consisting of: (1) cycloalkyl which is optionally substituted by hydroxy or lower alkoxy, (2) lower hydroxyalkyl, (3) lower hydroxyhalogenalkyl, (4) —CH 2 —CR 9 R 10 -cycloalkyl, wherein (i) R 9 is hydrogen or lower alkyl and (ii) R 10 is hydrogen, hydroxy or lower alkoxy; and (5) —CR 11 R 12 —COOR 13 ; wherein (i) R 10 is hydrogen, hydroxy or lower alkoxy, (ii) R 11 and R 12 independently from each other are hydrogen or lower alkyl; and (iii) R 13 is lower alkyl; (b) R 2 is hydrogen; (c) R 3 is selected from the group consisting of: (1) cycloalkyl, (2) lower cycloalkylalkyl, (3) lower alkoxy, (4) lower alkoxyalkyl, (5) halogen, (6) lower halogenalkyl, (7) phenyl, which is unsubstituted or mono-substituted or di-substituted independently by lower alkyl or halogen, (8) lower phenylalkyl, wherein said phenyl is unsubstituted or mono-substituted or di-substituted independently by lower alkyl or halogen, (9) heteroaryl, which is unsubstituted or mono-substituted or di-substituted independently by lower alkyl or halogen, and (10) lower heteroarylalkyl, wherein the heteroaryl group is unsubstituted or mono-substituted or di-substituted independently by lower alkyl or halogen; (d) R 4 and R 8 independently from each other are hydrogen or halogen; (e) R 5 and R 7 independently from each other are selected from the group consisting of hydrogen, halogen, lower halogenalkyl, lower halogenoalkoxy, and cyano; and (f) R 6 is selected from the group consisting of hydrogen, halogen, lower halogenalkyl, lower halogenalkoxy, and cyano.