Synonyms: Amenorone forte;Ethinyl estradiol mixture with ethisterone;Ethinylestradiol and ethisterone (1:1000);Ethisterone and ethinylestradiol (1000:1);17-alpha-Pregn-4-en-20-yn-3-one, 17-hydroxy-, and 19-nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol (1:1000);Pregn-4-en-20-yn-3-one, 17-hydroxy-, (17alpha)-, mixt. with (17alpha)-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol;AC1L25A3;LS-97442;LS-118776;(8R,9S,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one; (8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol;53568-84-6