Synonyms: Pregn-4-ene-3,20-dione,6a-fluoro-16a,17,21-trihydroxy-, cyclic16,17-acetal with acetone (7CI,8CI);2H-Naphth[2',1':4,5]indeno[1,2-d][1,3]dioxole, pregn-4-ene-3,20-dione deriv.;11-Deoxyflurandrenolone; 6a-Fluoro-16a,17a-isopropylidenedioxypregn-4-en-21-ol-3,20-dione;6a-Fluoro-16a-hydroxy-11-deoxycortisone16,17-acetonide; 6a-Fluoro-16a-hydroxycortexolone16,17-acetonide; 6a-Fluoro-21-hydroxy-16a,17a-(isopropylidenedioxy)pregn-4-ene-3,20-dione;6a-Fluoropregn-4-ene-16a,17a,21-triol-3,20-dione acetonide