The present invention relates to novel 11-oxo-11H-pyrido[2,1-b]quinazoline-6-carboxamide derivatives of formula (I) as potent inhibitors of protein kinases, pharmaceutical compositions containing them, and protein kinases. It relates to the use of said compounds for the manufacture of a medicament for the treatment of a disease or pathological disorder which is ameliorated by inhibition. [Chemical 1] [Selection diagram] None本発明はプロテインキナーゼの強力な阻害剤としての式（Ｉ）の新規１１－オキソ－１１Ｈ－ピリド［２，１－ｂ］キナゾリン－６－カルボキサミド誘導体、それらを含む医薬組成物、及びプロテインキナーゼの阻害により改善される病気又は病的疾患の治療用の薬剤の製造への前記化合物の使用に関する。【化１】【選択図】なし
