| abstract |
The present invention provides a novel pyridazinone compound having an inhibitory activity on a P2X7 receptor, which is a kind of purine receptor, and useful for the prevention, treatment or amelioration of diseases involving inflammation and immunity. A novel pyridazinone compound represented by formula (I) (wherein R 1 , R 2 , Q, X, Y and Z are defined in the text), and tautomers of the compound , Prodrugs or pharmaceutically acceptable salts thereof, or solvates thereof. [Selection figure] None |