title: Formation of an unusual steroidal oxetane and its transformation products.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D011282:Pregnenediones; D013260:Steroids, Heterocyclic / Q000138:chemical synthesis*; D014961:X-Ray Diffraction
chemical_list: D011282:Pregnenediones; D013260:Steroids, Heterocyclic