Patent ID: 7432256

Claim:
A compound of formula I wherein R 1 is hydrogen, halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy, lower alkoxy substituted by halogen, nitro, cycloalkyl, —O(CH 2 ) m O(CH 2 ) m OH or —C≡C—R′; R 2 is hydrogen or methyl; R 3 is lower alkyl, lower alkyl substituted by halogen, lower alkenyl, lower alkenyl substituted by halogen, lower alkynyl, —(CH 2 ) n -cycloalkyl, —(CR′R″) m —CH 3 , phenyl that is unsubstituted or substituted by halogen, pyridinyl or thienyl each of which is unsubstituted or substituted by lower alkyl, —(CH 2 ) n —NH-cycloalkyl, lower alkenyl-cycloalkyl, lower alkynyl-(CR′R″) m OH, or lower alkynyl-phenyl wherein the phenyl ring is unsubstituited or substituted by halogen, CF 3 , lower alkyl or lower alkoxy; R′ is hydrogen or lower alkyl; R″ is hydrogen, hydroxy or lower alkyl; n is 0, 1 or 2; m is 1, 2 or 3; and o is 1 or 2; or a pharmaceutically acceptable acid addition salt thereof.