英文别名(17α)-17-(Acetyloxy)-19-norpregn-5-en-20-yn-3-one; 5,6-Didehydronorethindrone acetate; Norethindrone Acetate EP Impurity C; Norethindrone acetate impurity C; Norethisterone Acetate EP Impurity C; delta-5(6)-Didehydronorethindrone acetate; (17a)-17-(Acetyloxy)-19-norpregn-5-en-20-yn-3-one; 3-Oxo-17alpha-19-norpregn-5-en-20-yn-17-yl acetate; 19-Norpregn-5-en-20-yn-3-one, 17-(acetyloxy)-, (17alpha)-; Norethiesterone Acetate EP Impurity C; Norethindrone acetate impurity; Δ-5(6)-Norethindrone Acetate; [(8R,9S,10R,13S,14S,17R)-17-ethynyl-13-methyl-3-oxo-1,2,4,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl] acetate 
