Synonyms: | 17-epi-Norethindrone;17-epi-Norethindrone (Impurity G);17-Hydroxy-19-norpregn-4-en-20-yn-3-one;18-Methyllevonorgestrel;19-Norpregn-4-en-20-yn-3-one, 17-hydroxy-;Norethindrone Impurity 7(Norethindrone EP Impurity G);(8R,9S,10R,13S,14S,17S)-17-ethynyl-17-hydroxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one;Norethisterone Impurity G |