title: Separation of theophylline from sulfamethoxazole and ampicillin by liquid chromatography.
mesh_terms: D000667:Ampicillin / Q000097:blood; D006801:Humans; D006863:Hydrogen-Ion Concentration; D013420:Sulfamethoxazole / Q000097:blood; D013806:Theophylline / Q000097:blood* / Q000302:isolation & purification
chemical_list: D000667:Ampicillin; D013806:Theophylline; D013420:Sulfamethoxazole