Patent ID: 7829563

Claim:
A compound of formula I wherein Ar 1 , Ar 2 and Ar 3 are each independently unsubstituted or substituted aryl or heteroaryl; R 1 , R 2 and R 3 are each independently hydroxy, halogen, lower alkyl, lower alkyl substituted by hydroxy lower alkyl substituted by halogen, (CH 2 ) p -cycloalkyl lower alkoxy, lower alkoxy substituted by halogen, cyano, 3-hydroxy-oxetan-3-yl, SO 2 -lower alkyl or di-lower alkyl amino; R 4 and R 5 are each independently hydrogen, lower alkyl, lower alkyl substituted by halogen, lower alkyl substituted by hydroxy, —(CH 2 ) o —O-lower alkyl, —(CH 2 ) o —N-(lower alkyl) 2 , (CH 2 ) p -cycloalkyl, (CH 2 ) p -aryl, which aryl ring may be substituted by halogen, or R 4 and R 5 together with the N-atom to which they are attached form a heterocyclic ring, optionally containing further ring-heteroatoms selected from N, O and S; R 6 is hydrogen or lower alkyl; R 7 is hydrogen or lower alkyl; R 8 is hydrogen or cyano; n is 0, 1, 2 or 3; o is 1, 2 or 3; and p is 0, 1 or 2; or a pharmaceutically suitable acid addition salt, an optically pure enantiomer, racemate or a diastereomeric mixture thereof.