Patent ID: 8618159

Claim:
A compound of formula (I): wherein R, R 1 , R 2 and R 3 are the same or different and independently of each other chosen from hydrogen, (C 1 -C 4 )alkyl or CF 3 ; R 4 is selected from the group consisting of dimethylaminomethyl, methanesulfonylmethyl, phenoxymethyl, vinylbenzene, ethynylbenzene, vinylpyridine, phenyl, benzofuranyl, dihydro-benzofuranyl, oxo-tetrahydro-benzofuranyl, benzodioxolyl, oxo-chromenyl, dihydrobenzo-dioxinyl, dioxo-tetrahydro-1H-benzo[e]diazepinyl, imidazopyridinyl, benzotriazolyl, benzoimidazolyl, oxo-dihydro-benzoimidazolyl, indolyl, indazolyl, naphthyridinyl, quinolinyl, benzoimidazothiazolyl, pyridinyl, pyrimidinyl, pyrrolyl, triazolyl, thienyl, thiazolyl, tetrahydrofuranyl or pyrrolidinyl; wherein said R 4 is optionally substituted one or more times with a substituent selected from halogen, methyl, ethyl, isopropyl, propoxyethyl, phenyl, benzoyl, difluoromethoxy, CF 3 , CN, acetyl, methanesulfonyl, sulfamoyl, dimethylamino, N-formyl-methylamino, 2-hydroxyethylamino, 2-methoxyethylamido, benzyloxymethyl, carboxyphenoxy, pyrazolyl, 3,5-dimethyl-pyrazolyl, imidazolyl, triazolyl, oxazolyl, pyridinyl, oxo-dihydro-pyridinyl, pyrimidinyl-methylamino, N-acetyl-piperidinyl, morpholinyl, morpholinylmethyl or 2-oxo-pyrrolidinyl; or a salt thereof or an enantiomer or a diastereomer thereof.