PROBLEM TO BE SOLVED: To provide a compound having selective RET kinase inhibitory action and useful for the treatment of cancer, or a pharmaceutically acceptable salt thereof.SOLUTION: The present invention provides a pyridinoquinoline derivative, having a 1,2-oxazolyl group, or a pyrazolyl group, represented by the following 2 compound, or a pharmaceutically acceptable salt thereof.SELECTED DRAWING: None【課題】選択的なRETキナーゼ阻害作用を有し、癌の治療に有用な化合物又はその薬学的に許容される塩の提供。【解決手段】下記２化合物に代表される、１，２－オキサゾリル基、或いはピラゾリル基を有するピリジノキノリン誘導体又ははその薬学的に許容される塩。【選択図】なし
