.DELTA.-Fluorocortisone 338-95-4 9-Fluoroprednisolone 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-