title: Quantitative gas chromatographic determination of methapyrilene fumarate, ephedrine hydrochloride, and codeine phosphate in syrup.
mesh_terms: D000654:Amobarbital; D002849:Chromatography, Gas; D003061:Codeine / Q000032:analysis*; D004809:Ephedrine / Q000032:analysis*; D006634:Histamine H1 Antagonists / Q000032:analysis*; D008722:Methods
chemical_list: D006634:Histamine H1 Antagonists; D004809:Ephedrine; D000654:Amobarbital; D003061:Codeine