abstract |
The invention provides 1,5-dihydro-4H-pyrazolo [3,4-d] pyrimidin-4-ones and 1,5-dihydro-4H-pyrazolo [4,3-c] pyridin-4-ones of formula (I) as PDE1 inhibitors and their use as a medicine, in particular for the treatment of neurodegenerative disorders and mental disorders. |