| abstract |
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R 1 is hydrogen or fluorine, one of A and B is R2, the other is a group -X-Y-R3. R3 represents a carbocyclic or heterocyclic ring. Further variables are as defined in the specification. Also claimed are- processes for their preparation, pharmaceutical compositions containing them and their use in therapy of diseases such as schizophrenia, cognitive disorders and pain by modulating the D-amino acid oxidase enzyme (DAAO). |