Standards; Chiral Molecules; Steroids; Pharmaceutical/API Drug Impurities/Metabolites;
應(yīng)用:
4,5-Epoxy-13-ethyl-17-hydroxy-18,19-dinor-17α-pregn-20-yn-3-one is an intermediate in the synthesis of derivatives of Levonogestrel (N689510), an emergency contraceptive.