title: An abnormal ring cleavage of lalpha,2alpha-epoxy-3-keto steroids by hydrogen fluoride.
mesh_terms: D000731:Androstanes; D055598:Chemical Phenomena; D002621:Chemistry; D005459:Fluorides; D009682:Magnetic Resonance Spectroscopy
chemical_list: D000731:Androstanes; D005459:Fluorides