6.alpha.-Fluoro-cortisone 21-acetate 633-24-9 NSC85995 Pregn-4-ene-3,11,20-trione, 21-(acetyloxy)-6-fluoro-17-hydroxy-, (6.alpha.)- Pregn-4-ene-3,11,20-trione, 6.alpha.-fluoro-17,21-dihydroxy-, 21-acetate