abstract |
Compounds of Formula I: n n n n n n n n n n in free or salt form, wherein R a , R b , R 2 , R 3 , R 4 and R 5 have the meanings as indicated in the specification, are useful for treating conditions that are mediated by phosphatidylinositol 3-kinase. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described. |