Patent ID: 8569288

Claim:
A compound of formula 1 wherein R 1 is CH 3 , R 2 is CH 3 or —(CH 2 ) n —R 4 or —(CH 2 ) n —O—R 4 or —(CH 2 ) n —S—R 4 wherein n is 1, 2, 3 or 4 and R 4 is CH 3 , CH 2 CH 3 or CH 2 CH 2 OCH 3 , and R 3 is hydrogen or —OCH 2 O— or —OCH 2 CH 2 O— connected to the ortho/meta position or meta/para position of the phenyl ring; or R 1 and R 2 are hydrogen and R 3 is —OCH 2 O— Or —OCH 2 CH 2 O— connected to the ortho/meta position or meta/para position of the phenyl ring; and pharmaceutically acceptable acid addition salts thereof.