31790-64-4 9-FLUORO-11B,16A,17,21-TETRAHYDROXYPREGN-4-ENE-3,20-DIONE,CYCLIC 16,17-ACETAL WI 9alpha-Fluoro-11beta,16alpha,17,21-tetrahydroxypregn-4-ene-3,20-dione, cyclic 16,17-acetal with acetophenone, 21-acetate Pregn-4-ene-3,20-dione, 21-(acetyloxy)-9-fluoro-11-hydroxy-16,17-((1-phenylethylidene)bis(oxy))-, (11beta,16alpha)- Pregn-4-ene-3,20-dione, 9-fluoro-11beta,16alpha,17,21-tetrahydroxy-, 21-acetate, 16,17-acetal with acetophenone