title: Determination of 1-(3'-carboxypropyl)-3,7-dimethylxanthine and 1-(4'-carboxybutyl)-3,7-dimethylxanthine, two major metabolites of oxpentifylline, in urine by high-performance liquid chromatography.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007202:Indicators and Reagents; D007700:Kinetics; D010431:Pentoxifylline / Q000031:analogs & derivatives* / Q000378:metabolism* / Q000652:urine; D013056:Spectrophotometry, Ultraviolet; D013805:Theobromine / Q000031:analogs & derivatives*
chemical_list: D007202:Indicators and Reagents; C047155:1-(4'-carboxybutyl)-3,7-dimethylxanthine; C047154:1-(3'-carboxypropyl)-3,7-dimethylxanthine; D013805:Theobromine; D010431:Pentoxifylline