Organic compounds

摘要

Compounds of formula I in free or salt form, wherein R¹, R², R³ and R⁴ have the meanings as indicated in the specification, are useful for treating a condition mediated by activation of the adenosine A2b receptor or the adenosine A3 receptor, particularly an inflammatory or obstructive airways disease. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.