title: The conjugated estrogens. I. A new fractionation procedure suitable for large volumes of urine. A. Normal pregnancy urine.
mesh_terms: D011232:Chemical Precipitation; D002850:Chromatography, Gel; D002855:Chromatography, Thin Layer; D003124:Colorimetry; D003460:Crystallization; D004966:Estrogens, Conjugated (USP) / Q000302:isolation & purification / Q000652:urine*; D005260:Female; D006801:Humans; D008722:Methods; D011247:Pregnancy; D000644:Quaternary Ammonium Compounds; D013053:Spectrophotometry; D013431:Sulfates
chemical_list: D004966:Estrogens, Conjugated (USP); D000644:Quaternary Ammonium Compounds; D013431:Sulfates