The following formula (1) or (2)(In formula, R1 and R2 showing methyl group respectively, or R1 and R2 becoming simultaneous and be possible to form methylene basis, as for R3 hydrogen atom or methoxy basis is shown)So the malignant tumor remedy which contains the chemical compound which is displayed.次の式(1)又は(2)(式中、R1及びR2はそれぞれメチル基を示すか、R1とR2が一緒になってメチレン基を形成してもよく、R3は水素原子又はメトキシ基を示す)で表される化合物を含有する悪性腫瘍治療薬。