| abstract |
Formula (I): (I) [Wherein R 6 , R 7 , R 8 , R 21 , X, Ar, and m are as defined in the specification] Or a salt thereof is provided. Also disclosed is the use of the compound as a medicament and in the manufacture of a medicament for the treatment of neurological and neuropsychiatric disorders, in particular psychosis, dementia or attention deficit disorder. Furthermore, the present invention discloses pharmaceutical compositions and combinations comprising the compounds. |