Patent ID: 7834044

Claim:
A compound according to formula I wherein R 1 is selected from the group consisting of hydrogen and lower alkyl; each R 2 is independently selected from the group consisting of hydrogen and lower alkyl; each R 3 is independently selected from the group consisting of hydrogen, lower alkyl, lower alkoxy, phenyloxy, benzyloxy, halogen and lower alkyl substituted by halogen; X is selected from the group consisting of —CH 2 —, —CH—and —O—; Y is selected from the group consisting of —CH 2 —, —CH—and a bond with the proviso that, when X is —O—, Y may not be a bond; Z is selected from the group consisting of —CH 2 —and —CH—; m is 0, 1 or 2; and n is 0, 1 or 2; or a pharmaceutically-acceptable acid addition salt thereof.