Dexamethasone 9,11-epoxide is a potential impurity found in preparations of dexamethasone.1 It is an autooxidative degradation product formed under alkaline conditions.
1.Li, M., Chen, B., Monteiro, S.G., et al.Mechanism of base-catalyzed autooxidation of corticosteroids containing 20-keto-21-hydroxyl side chainTetrahedron Lett.50(32)4575-4581(2009)
















