title: [Studies on gas chromatographic quantitative determination and identification of compound tablets of theophylline].
authors.forename: B M
authors.initials: BM
authors.lastname: Xu
mesh_terms: D002110:Caffeine / Q000032:analysis; D002849:Chromatography, Gas; D004338:Drug Combinations; D004809:Ephedrine / Q000032:analysis; D010615:Phenacetin / Q000032:analysis; D013806:Theophylline / Q000032:analysis*
chemical_list: D004338:Drug Combinations; D002110:Caffeine; D013806:Theophylline; D010615:Phenacetin; D004809:Ephedrine