PROBLEM TO BE SOLVED: To provide anticancer agents having high toxicity to cancer cells and low toxicity to normal cells, that is, having a selective toxicity to cancer cells, in particular, anticancer agents against prostatic cancer, bladder cancer, kidney cancer, lung cancer and malignant mesothelioma.SOLUTION: Provided is an anticancer agent that comprises a compound represented by the following formula or a pharmaceutically acceptable salt thereof as an effective component.SELECTED DRAWING: None