英文同义词: | 7-(2,2-diethoxyethyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione;1H-Purine-2,6-dione, 7-(2,2-diethoxyethyl)-3,7-dihydro-1,3-dimethyl-;Theophylline impurities821;7-(2,2-diethoxyethyl)-1,3-dimethyl-1H-purine-2,6(3H,7H)-dione;Chlorzoxazone Impurity 23 |