Patent ID: 8394834

Claim:
A compound of formula I wherein R 1 is hydrogen or lower alkyl; R 2 is hydrogen, lower alkyl, lower alkyl substituted by halogen or is halogen or CN, and where o is 2 each R 2 is the same or different; Ar 1 is aryl or heteroaryl; Ar 2 is aryl or heteroaryl; R′ and R″ are each independently hydrogen, lower alkyl, lower alkoxy, halogen, C(O)-lower alkyl, cyano or lower alkyl substituted by halogen; m is 0, 1, or 2 when n is 0; or m is 0 or 1 when n is 1; n is 0 or 1; and o is 1 or 2; or a pharmaceutically active salt, racemic mixture, enantiomer, optical isomer or tautomeric form thereof.