PROBLEM TO BE SOLVED: To provide an oxaaziridine compound that shows anti-fungal activity and cytotoxicity and is expected as a new antifungal agent or anticancer agent and a method for producing the same.SOLUTION: The present invention provides a compound represented by formula 1 or a salt thereof [X is a single bond, -C(H)(R)- or -C(H)(R)-C(H)(R)-; R-Rindependently represent a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group].SELECTED DRAWING: None【課題】抗真菌活性及び細胞毒性を示し、新たな抗真菌剤または抗がん剤として期待されるオキサアジリジン化合物およびその製造方法を提供。【解決手段】式1:[Xは単結合、-C(H)(R6)-又は-C(H)(R7)-C(H)(R8)-;R1~R8は、夫々独立して、水素原子、置換されていてもよい炭化水素基または置換されていてもよい複素環基を示す。]で表される化合物またはその塩。【選択図】なし