PROBLEM TO BE SOLVED: To provide a condensed-ring pyrimidinone derivative having excellent autotaxin inhibitory activity.SOLUTION: The present invention provides a compound illustrated by the following formula and the like or a pharmaceutically acceptable salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】優れたオートタキシン阻害活性を有する縮環ピリミジノン誘導体の提供。【解決手段】下記式等で例示される化合物またはその製薬上許容される塩。【選択図】なし