PYRIMIDINE DERIVATIVES FOR THE TREATMENT OF ASTHMA,COPD,ALLERGIC RHINITIS,ALLERGIC CONJUNCTIVITIS,ATOPIC DERMATITIS,CANCER,HEPATITS B,HEPATITIS C,HIV,HPV,BACTERIAL INFECTIONS AND DERMATOSIS

摘要

The present invention provides compounds of formula (I) wherein R1, R2, R3 and R4 are as defined in the specification, and pharmaceutically acceptable salts thereof, as well as processes for their preparation, pharmaceutical compositions containing them and their use in therapy.