Patent ID: 8883807

Claim:
A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: X is selected from —C(R 8 )═or —N═, wherein R 8 is hydrogen, F or CN; R 1 is selected from the group consisting of: C 1-4 alkyl, cyclopropylmethyl, cyclobutylmethyl and [1-(trifluoromethyl)cyclopropyl]methyl, each of which is optionally substituted with one or more substituents as allowed by valence independently selected from the group consisting of: F and hydroxy; R 2 is selected from hydrogen and methyl; when R 2 is hydrogen then R 3 is selected from hydrogen, F or Cl; R 4 is selected from hydrogen, F or Cl; R 5 is hydrogen; R 6 is selected from hydrogen or F; and R 7 is selected from hydrogen, F or Cl; except that at least two of R 3 , R 4 , R 6 and R 7 must be F or Cl unless R 3 is F in which case R 4 , R 6 and R 7 may all be hydrogen; and if R 4 is Cl then R 7 cannot be Cl; when R 2 is methyl then R 3 is selected from hydrogen, methyl, F, Cl, or Br; R 4 is selected from hydrogen, methyl, F or Cl; R 5 is selected from hydrogen or F; R 6 is selected from hydrogen or F; and R 7 is selected from hydrogen, methyl, F or Cl; except that if R 5 is F then at least three of R 3 , R 4 , R 6 and R 7 must be F; and if R 4 is methyl or Cl then R 7 cannot be methyl or Cl.