(17alpha)-17-(Acetyloxy)-19-norpregn-5(10)-en-20-yn-3-one; 17-Hydroxy-19-Nor-17?-pregn-5(10)-en-20-yn-3-one Acetate; Norethisterone Acetate Impurity B (EP); Delta-5(10)-Norethindrone Acetate
(17alpha)-17-(Acetyloxy)-19-norpregn-5(10)-en-20-yn-3-one; 17-Hydroxy-19-Nor-17?-pregn-5(10)-en-20-yn-3-one Acetate; Norethisterone Acetate Impurity B (EP); Delta-5(10)-Norethindrone Acetate