title: Thin-layer chromatography of caffeine and related methylxanthines.
mesh_terms: D002110:Caffeine / Q000302:isolation & purification*; D002855:Chromatography, Thin Layer; D007042:Hypoxanthines / Q000302:isolation & purification; D008722:Methods; D012997:Solvents; D014970:Xanthines / Q000302:isolation & purification*
chemical_list: D007042:Hypoxanthines; D012997:Solvents; D014970:Xanthines; D002110:Caffeine