PROBLEM TO BE SOLVED: To provide an agent for the prevention or treatment of a disease resulting from NADPH oxidase (NOX) or NFκB.SOLUTION: An NOX inhibitor contains methoxy flavone represented by formula (I), where [R1, R4 and R5 independently denote H or a methoxy group; R2 and R3 each denote a methoxy group].SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】NADPHオキシダーゼ(NOX)やNFκBに起因する疾患の予防又は治療剤の提供。【解決手段】式(I)で表されるメトキシフラボンを含むNOX阻害剤。[R1、R4及びR5は各々独立に、H又はメトキシ基;R2及びR3はメトキシ基]【選択図】なし