title: Method for the separation and quantification of methylated hydroxypurines found in urine of man and its application to the study of human metabolism of methylxanthines.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D011687:Purines / Q000652:urine*; D013805:Theobromine / Q000378:metabolism*
chemical_list: D011687:Purines; D013805:Theobromine