title: [Analytical studies on compound preparations containing ethinylestradiol].
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003277:Contraceptives, Oral, Combined / Q000032:analysis*; D004997:Ethinyl Estradiol / Q000032:analysis*; D008535:Megestrol / Q000032:analysis; D009640:Norethindrone / Q000032:analysis; D009644:Norgestrel / Q000032:analysis
chemical_list: D003277:Contraceptives, Oral, Combined; D009644:Norgestrel; D004997:Ethinyl Estradiol; D008535:Megestrol; D009640:Norethindrone