Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-9-fluoro-11,17-dihydroxy-16-methyl-, (11beta,16alpha)-, mixt. with 2-(diethylamino)-N-(2,6-dimethylphenyl)acetamide and 2,5-dihydroxybenzenesulfonic acid calcium salt (2:1)