title: 6-Sulfinyl derivatives of xanthines.
mesh_terms: D003499:Cyclic S-Oxides / Q000138:chemical synthesis; D007536:Isomerism; D008722:Methods; D013806:Theophylline / Q000031:analogs & derivatives / Q000138:chemical synthesis; D014970:Xanthines / Q000138:chemical synthesis*
chemical_list: D003499:Cyclic S-Oxides; D014970:Xanthines; D013806:Theophylline