Standards; Steroids; Isotopic Labeled Analogues; Pharmaceutical/API Drug Impurities/Metabolites;
应用:
Progestogen. In combination with estrogen as oral contraceptive.A representative lot was 4.5% d4, 17.2% d5, 43.3% d6, 30.2% d7, 4.8% d8 with no detectable d0.