52-70-0 6alpha,9-Difluoro-11beta,17,21-trihydroxypregna-1,4-diene-3,20-dione 21-acetate EINECS 200-150-9 Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-6,9-difluoro-11,17-dihydroxy-, (6alpha,11beta)- Pregna-1,4-diene-3,20-dione, 6alpha,9-difluoro-11beta,17,21-trihydroxy-, 21-acetate