Patent ID: 8404741

Claim:
A compound of Formula (I) or a pharmaceutically acceptable salt thereof, wherein: Ar 1 is selected from naphthyl and phenyl, wherein the phenyl is substituted with 0, 1, or 2 substituents independently selected from alkyl, halo, haloalkoxy, alkoxy, and cyano; or Ar 1 is Ar 2 is selected from hydrogen, phenyl, naphthyl, pyrimidinyl, thiazolyl, and quinolinyl, wherein the phenyl, naphthyl, pyrimidinyl, thiazolyl, and quinolinyl are each substituted with 0, 1, or 2 substituents independently selected from alkyl, alkoxy, trifluoromethyl, trifluoromethoxy, cyano, and halo; R 1 is selected from hydrogen, cyano, halo, alkyl, alkoxy, and haloalkoxy; and R 2 and R 3 are each lower alkyl; or R 2 and R 3 , together with the carbon atom to which they are attached, form a 3- to 5-membered carbocyclic ring optionally containing an oxygen atom.