| abstract |
Pyrazolo [1,5-a] pyrimidine derivatives represented by the formula (I) and their pharmaceutically acceptable salts exhibit excellent kinase inhibitory activity. Accordingly, it is anticipated that a drug containing the compound as an active ingredient will be useful as a therapeutic or prophylactic agent for protein kinase mediated disorders involving kinases such as inflammatory diseases, autoimmune diseases, disruptive bone disorders, cancer and / or tumor growth. H, N, R 3 |