Eliminating 1,7-dimethylxanthine interference from reversed-phase liquid-chromatographic analysis for theophylline.
D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D007536:Isomerism; D013806:Theophylline / Q000097:blood* / Q000302:isolation & purification
D013806:Theophylline; C021183:1,7-dimethylxanthine