| abstract |
or to pharmaceutically active acid addition salts thereof, to racemic mixtures or to its corresponding enantiomers and/or optical isomers and/or stereoisomers thereof. The compounds may be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome. |