| abstract |
There is provided compounds of formula (I): wherein R 1 , R 2 and R 3 have meanings given in the description, and pharmaceutically-acceptable esters, amides, solvates or salts thereof, which compounds are useful in the treatment of diseases in which inhibition of a protein or lipid kinase (e.g. PI3-K, particularly class I PI3K) is desired and/or required, and particularly in the treatment of cancer. |