Synonyms: 1H-Purine-2,6-dione,3,7-dihydro-1,3-dimethyl-8-phenyl- (9CI); Theophylline, 8-phenyl-(6CI,7CI,8CI); 1,3-Dimethyl-8-phenylxanthine;3,7-Dihydro-1,3-dimethyl-8-phenyl-1H-purine-2,6-dione; 8-PT;8-Phenyl-1,3-dimethylxanthine; 8-Phenyltheophylline; NSC 14127