Patent ID: 8252824

Claim:
A method of therapeutically treating a disease in a patient, said disease selected from the group consisting of dementia, Alzheimer's disease, multiple sclerosis, schizophrenia, and attention deficit hyperactivity disorder, comprising administering to said patient a therapeutically effective amount of 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, 2-, 4- or 5-oxazolyl, 3-, 4- or 5-isoxazolyl and 3-, 4- or 5-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 optionally in combination with one or more pharmaceutically acceptable excipient, diluent or a carrier.