| abstract |
The present invention provides compounds of formula (I), pharmaceutically acceptable salts or esters thereof, useful as prolyl oligopeptidase inhibitors, wherein structures X, R 1 , R 2 and R 3 are defined in claim 1 As defined.n n n n n n n n Structural formula (I) compounds can be used for the treatment of diseases or syndromes in which prolyl oligopeptidase inhibitors are known to be effective, for example, for the treatment of neurodegenerative diseases such as Alzheimer's syndrome and senile dementia. |