PROBLEM TO BE SOLVED: To provide a cancer cell inhibitory drug, particularly a cancer stem-cell inhibitory drug, or a cancer stem-cell detection probe.SOLUTION: The present invention provides a cancer cell inhibitory drug at least comprising a compound represented by the general formula (1).【課題】本発明の目的は、がん細胞阻害薬、特に、がん幹細胞阻害薬、または、がん幹細胞検出プローブを提供すること。【解決手段】少なくとも、一般式(1)で表される化合物を含むことを特徴とするがん細胞阻害薬。【選択図】なし