Patent ID: 7470684

Claim:
A compound of formula wherein R 1 is hydrogen or lower alkyl; R 2 is lower alkyl, lower hydroxyalkyl or —(CHR 5 ) x -A; R 5 is hydrogen, lower alkyl, lower hydroxyalkyl, or heteroaryl optionally substituted by lower alkyl; A is a cycloalkyl, aryl, heterocyclyl or heteroaryl ring, which rings are optionally substituted by one or more R 6 , wherein R 6 is lower alkyl, lower alkoxy, lower alkylsulfonyl, cyano, halogen, lower alkyl substituted by halogen or lower alkoxy substituted by halogen, or is aryl, heterocyclyl or heteroaryl optionally substituted by lower alkyl or is cycloalkyl optionally substituted by lower alkyl; x is 0, 1, 2 or 3; or R 1 and R 2 together with the N-atom to which they are attached form a heterocyclyl or heteroaryl ring, which rings are optionally substituted by one or more substituents selected from the group consisting of lower alkyl, lower alkoxy, lower alkylsulfonyl, halogen, cycloalkyl, benzyl and aryl; R 3 is hydrogen or halogen; R 4 is hydrogen or lower alkyl; R 7 is hydrogen, halogen or lower alkyl; m is 1 or 2; when m is 2, each R 3 can be the same or different; n is 1 or 2; o is 1 or 2; when o is 2, each R 7 can be the same or different; or a pharmaceutically suitable acid addition salt thereof.