| 英文同义词: | 1,3-DIMETHYL-7-(OXIRAN-2-YLMETHYL)-2,3,6,7-TETRAHYDRO-1H-PURINE-2,6-DIONE;Theophylline Impurity 23;Dyphylline Impurity 4;1,3-dimethyl-7-(oxiran-2-ylmethyl)-3,7-dihydro-1H-purine-2,6-dione;Dyphylline Impurity N;1,3-dimethyl-7-(oxiran-2-ylmethyl)-1H-purine-2,6(3H,7H)-dione |