Patent ID: 7579369

Claim:
A compound of formula (I): or a pharmaceutically acceptable salt thereof wherein: (a) X is C or N; (b) R 1 is hydrogen or lower alkyl; (c) R 2 is (CH 2 ) n —R 2a , wherein R 2a is cycloalkyl which is optionally mono-substituted, di-substituted, tri-substituted or tetra-substituted, independently, by a substituent selected from the group consisting of hydroxy, lower alkyl, lower alkoxy, fluorinated lower alkyl and fluorinated lower alkoxy; (d) R 3 is cycloalkyl which is optionally mono-substituted, di-substituted, tri-substituted or tetra-substituted, independently, by a substituent selected from the group consisting of hydroxy, lower alkyl, lower alkoxy, fluorinated lower alkyl and fluorinated lower alkoxy; (e) R 4 is selected from the group consisting of: (1) naphthyl, which is optionally mono-substituted, di-substituted or tri-substituted, independently, by a substituent selected from the group consisting of hydroxy, lower alkyl, lower alkoxy, halogen, lower alkylamino, halogenated lower alkyl, halogenated lower alkoxy and nitro; and (2) phenyl, which is optionally mono-substituted, di-substituted or tri-substituted, independently, by a substituent selected from the group consisting of hydroxy, lower alkyl, lower alkoxy, halogen, nitro, halogenated lower alkyl, halogenated lower alkoxy, cyano, lower alkylsulfonyl and —NR 7 R 8 ; or two adjacent substituents of said phenyl residue together are —O—(CH 2 ) p —O— or —(CH 2 ) 2 —C(O)NH—; (f) R 5 and R 6 are each independently selected from the group consisting of hydrogen, lower alkyl, halogen and fluorinated methyl; (g) R 7 and R 8 are each independently either hydrogen or lower alkyl; (h) m is 0, 1 or 2; (i) n is 0 or 1; and (j) p is 1, 2 or 3.