PROBLEM TO BE SOLVED: To provide a compound for use as an agent for preventing, inhibiting or treating cancer.SOLUTION: The present invention relates to a compound represented by formula (I), where a ring in the formula means a pyridazine, a pyrimidine or a pyrazine group, R independently represents H, a halogen atom, a CN group or the like, n is 1-3, n' is 1-2, R' is H, a halogen atom, a (C1-C3) alkyl group or the like, Z is N or C, Y is N or C, X is N or C, W is N or C, T is N or C, and U is N or C.COPYRIGHT: (C)2015,JPO&INPIT【課題】ガンを予防し、抑制し、又は治療する為の剤としての使用の為の化合物の提供。【解決手段】式(I)で表される化合物。(左の環はピリダジン、ピリミジン又はピラジン基;Rは独立に、H、ハロゲン原子又はCN基等;nは1~3;n’は1~2;R’はH、ハロゲン原子又は(C1-C3)アルキル基等;ZはN又はC;YはN又はC;XはN又はC;WはN又はC;TはN又はC;UはN又はC)【選択図】なし