Edogestrone 17α-Acetoxy-3,3-ethylenebisoxy-6-methylpregn-5-en-20-one Edogesterone PH-218 [(8'R,9'S,10'R,13'S,14'S,17'S)-17'-acetyl-6',10',13'-trimethylspiro[1,3-dioxolane-2,3'-2,4,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene]-17'-yl] acetate [(8'R,9'S,10'R,13'S,14'S,17'S)-17'-ethanoyl-6',10',13'-trimethyl-spiro[1,3-dioxolane-2,3'-2,4,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene]-17'-yl] ethanoate acetic acid [(8'R,9'S,10'R,13'S,14'S,17'S)-17'-acetyl-6',10',13'-trimethyl-spiro[1,3-dioxolane-2,3'-2,4,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene]-17'-yl] ester Pregn-5-ene-3,20-dione, 17-(acetyloxy)-6-methyl-, cyclic 3-(1,2-ethanediyl acetal)