title: Studies on the determination of nanogram amounts of gem-diphenyl-substituted drugs as benzophenones.
mesh_terms: D001577:Benzophenones / Q000032:analysis*; D002247:Carbon Isotopes; D002849:Chromatography, Gas; D006801:Humans; D008832:Microchemistry; D010084:Oxidation-Reduction; D011437:Propylamines / Q000097:blood*; D000644:Quaternary Ammonium Compounds / Q000097:blood*; D013696:Temperature
chemical_list: D001577:Benzophenones; D002247:Carbon Isotopes; D011437:Propylamines; D000644:Quaternary Ammonium Compounds