PROBLEM TO BE SOLVED: To provide: a quercetin derivative having stronger anticancer activity than quercetin and sinapic acid a method for producing the quercetin derivative an anticancer agent containing the quercetin derivative and further food, a pharmaceutical and a quasi drug.SOLUTION: A quercetin derivative represented by formula (1) or a pharmaceutically acceptable salt thereof, and an anticancer agent, food, a pharmaceutical and a quasi drug containing the quercetin derivative or the like are provided. Fig.1 is a chromatogram, and the peak of A shows a quercetin derivative.COPYRIGHT: (C)2014,JPO&INPIT【課題】ケルセチン、シナピン酸より強力な抗癌活性を有するケルセチン誘導体、該ケルセチン誘導体を、生成する方法、前記ケルセチン誘導体を含有する抗癌剤、さらには食品、医薬品、医薬部外品の提供。【解決手段】下記式(1)で示されるケルセチン誘導体又はその薬学的に許容可能な塩、及び該ケルセチン誘導体等を含有する抗癌剤、食品、医薬品または医薬部外品。なお、図1はクロマトグラムで、Aのピークは該ケルセチン誘導体。【選択図】図1
