PROBLEM TO BE SOLVED: To provide pharmaceutical compositions for treating cancer without side effects.SOLUTION: A pharmaceutical composition for treating cancer contains a compound represented by the following formula (I), and at least one selected from the group consisting of a physiologically acceptable of salt thereof and a physiologically acceptable hydrate thereof. [A is N, S, or N having an alkyl group having 1 to 3 carbon atoms R1 is H or -NO2. R2 and R3 jointly form H or the cycloalkyl ring of four to six-membered ring R4 and R5 jointly form H or the cycloalkyl ring of four to six membered-ring and the cycloalkyl rings are at least four alkyl groups having 1 to 3 carbon atoms.]SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】副作用がない、がんの治療用医薬組成物の提供。【解決手段】下記式(I)で表される化合物、生理学的に許容されるその塩及び生理学的に許容されるその水和物からなる群より選択されるものを少なくとも1以上含有する、がんの治療用医薬組成物。[AはN、S又は炭素数1~3のアルキル基を有するN;R1はH又は-NO2;R2及びR3はH又は、4~6員環のシクロアルキル環を共同して形成;R4及びR5は、H又は4~6員環のシクロアルキル環を共同して形成;前記シクロアルキル環は、少なくとも4つの炭素数1~3のアルキル基]【選択図】なし
