This invention is something which offers the new malignant tumor remedy. General system (1)(In formula, as for R1 hydrogen atom, showing hydroxy basis or methoxy basis As for R2 showing hydrogen atom or hydroxy basis As for R3 showing hydrogen atom or hydroxy basis As for R4 showing hydrogen atom or methoxy basis As for the broken line showing the thing the part of that has been allowed to have become double bond As for R5 hydrogen atom or formula (a)(In formula, arrow to show binding site, R1, R2, R3, as for R4 and broken line the same as the description above)So the basis which is shown is shown)So the malignant tumor remedy which designates the chemical compound which is displayed as the active ingredient.本発明は、新たな悪性腫瘍治療薬を提供するものである。一般式(1)(式中、R1は水素原子、ヒドロキシ基又はメトキシ基を示し;R2は水素原子又はヒドロキシ基を示し;R3は水素原子又はヒドロキシ基を示し;R4は水素原子又はメトキシ基を示し;破線はその部分が二重結合になっていてもよいことを示し;R5は水素原子又は式(a)(式中、矢印は結合部位を示し、R1、R2、R3、R4及び破線は前記と同じ)で示される基を示す)で表される化合物を有効成分とする悪性腫瘍治療薬。
