title: Preparation of 9-alpha,11-xi-tritiated 17-alpha-ethynylestradiol, mestranol, estradiol-alpha-17-beta, and norethindrone.
mesh_terms: D015068:17-Ketosteroids; D000480:Alkynes; D000535:Aluminum; D001896:Boron Compounds; D001965:Bromides; D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D002855:Chromatography, Thin Layer; D002857:Chromium; D004958:Estradiol / Q000138:chemical synthesis*; D004962:Estranes; D004987:Ethers; D004997:Ethinyl Estradiol / Q000138:chemical synthesis*; D006018:Glycols; D006865:Hydrogenation; D007202:Indicators and Reagents; D007259:Infrared Rays; D007553:Isotope Labeling; D008094:Lithium; D008656:Mestranol / Q000138:chemical synthesis*; D008722:Methods; D009640:Norethindrone / Q000138:chemical synthesis*; D010084:Oxidation-Reduction; D011725:Pyridines; D013053:Spectrophotometry; D014316:Tritium
chemical_list: D015068:17-Ketosteroids; D000480:Alkynes; D001896:Boron Compounds; D001965:Bromides; D004962:Estranes; D004987:Ethers; D006018:Glycols; D007202:Indicators and Reagents; D011725:Pyridines; D002857:Chromium; D014316:Tritium; D004997:Ethinyl Estradiol; D004958:Estradiol; D008094:Lithium; D008656:Mestranol; D000535:Aluminum; D009640:Norethindrone