.delta.-Fluorocortisone 338-95-4 9-Fluoro-11,17,21-trihydroxypregna-1,4-diene-3,20-dione 9-Fluoroprednisolone AIDS-124097 AIDS124097 Isoflupredone NSC12174 Pregna-1, 4-diene-3,20-dione, 9-fluoro-11,17,21-trihydroxy-, (11.beta.)- Pregna-1,4-diene-3, 20-dione, 9-fluoro-11.beta.,17,21-trihydroxy-