PURINE DERIVATIVES ACTING AS A2A RECEPTOR AGONISTS.

摘要

Compounds of formula (I) in free or salt form, wherein R¹, R² and R³ have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A_2A receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.