Pregn-4-ene-3,20-dione, 21-chloro-9-fluoro-11-hydroxy-16,17-((1-methylethylidene)bis(oxy))-,(11beta,16alpha)-
21-Chloro-9-fluoro-11beta,16alpha,17-trihydroxypregn-4-ene-3,20-dione Cyclic 16,17-Acetal with Acetone