The invention is directed to certain novel compounds. Specifically, the invention is directed to compounds of formula (I): and salts thereof. The compounds of the invention are inhibitors of PI3-kinase activity.Linvention concerne certains nouveaux composés. Spécifiquement, linvention concerne des composés de formule (I) : et des sels de ceux-ci. Les composés de linvention sont des inhibiteurs de lactivité PI3 kinase.