Patent ID: 8088808

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 cyclopropyl, cyclopentyl, cyclohexyl, bicyclo[2,2,1]heptyl, cyclopentylmethyl, tetrahydropyranyl, furanyl, oxazolyl, isoxazolyl and pyrazolyl; wherein said R 4 is optionally substituted one or more times with a substituent selected from halogen, methyl, ethyl, pyridinyl, 2-oxo-2H-pyridin-1-yl and CF 3 ; or a pharmaceutically acceptable salt thereof or an enantiomer or a diastereomer thereof.