title: Synthesis of 2-hydroxy-ethynylestradiol and 4-hydroxy-ethynylestradiol.
mesh_terms: D002845:Chromatography; D004997:Ethinyl Estradiol; D006900:Hydroxylation; D006914:Hydroxysteroids / Q000138:chemical synthesis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009603:Nitroso Compounds; D010084:Oxidation-Reduction; D011193:Potassium Iodide; D012822:Silicon Dioxide; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013451:Sulfonic Acids
chemical_list: D006914:Hydroxysteroids; D009603:Nitroso Compounds; D013451:Sulfonic Acids; D011193:Potassium Iodide; D004997:Ethinyl Estradiol; D012822:Silicon Dioxide