title: Determination of a quaternary ammonium compound, emepronium bromide, in human urine by an ion-pair extraction method.
mesh_terms: D000284:Administration, Oral; D006801:Humans; D007474:Ion Exchange; D008433:Mathematics; D008722:Methods; D010276:Parasympatholytics / Q000008:administration & dosage / Q000652:urine*; D000644:Quaternary Ammonium Compounds / Q000008:administration & dosage / Q000652:urine*; D012007:Rectum; D013053:Spectrophotometry; D013997:Time Factors
chemical_list: D010276:Parasympatholytics; D000644:Quaternary Ammonium Compounds