Patent ID: 7754736

Claim:
A compound of the formula I: wherein: R 1 and R 2 together with the nitrogen atom to which they are attached form a piperidinyl moiety unsubstituted or substituted by one, two or three groups independently selected from lower alkyl, halogen, lower halogenalkyl, hydroxy, lower alkoxy, oxo, phenyl, benzyl, pyridyl and carbamoyl, or being condensed with a phenyl ring, said phenyl ring being unsubstituted or substituted by one, two or three groups independently selected from lower alkyl, lower alkoxy, halogen and lower halogenalkyl; R 3 is hydrogen; R 4 is selected from the group consisting of lower alkyl, cycloalkyl and lower cycloalkylalkyl; m is 1; and pharmaceutically acceptable salts thereof.