Patent ID: 8802690

Claim:
A compound of Formula (I) wherein R 1 is (C 1 -C 6 )alkyl, (C 3 -C 7 )cycloalkyl, tetrahydrofuranyl or oxetanyl; wherein said (C 1 -C 6 )alkyl is optionally substituted with (C 1 -C 3 )alkoxy, phenyl, or tetrahydrofuranyl; R 2 is hydrogen, halo, (C 1 -C 3 )alkyl, or cyano; R 3 are each independently hydrogen or (C 1 -C 3 )alkyl; R 4 is naphthyl optionally substituted with one to four substituents independently selected from (C 1 -C 3 )alkyl, (C 1 -C 3 )alkoxy, halo, amino, (C 1 -C 3 )alkylamino, di(C 1 -C 3 )alkylamino, hydroxy, cyano, amido, phenyl, 5 to 6 membered heteroaryl or 5 to 6 membered heterocyclyl; or a pharmaceutically acceptable salt thereof.