(6α,11β,16α,17α)-6-fluoro-11-hydroxy-16,17-[(1-methylethylidene)bis(oxy)]-3-oxo-androsta-1,4-diene-17-carboxylic Acid is a fluorosteroid which was prepared and used in the study of hormone pharmacology and tested for androgenic, anabolic, antiandrogenic, gestagenic, estrogenic, antiestrogenic thymolytic, antiinflammatory, and mineralocorticoid activities.