英文别名Doxofylline Impurity 1; Doxofylline Impurity 2; 3-(1,3-dioxolan-2-ylmethyl)-N-methyl-5-(methylamino)imidazole-4-carboxamide; Doxofylline-2; Doxofylline USP Related Compound B; Doxofylline USP RC B; 1H-Imidazole-5-carboxamide, 1-(1,3-dioxolan-2-ylmethyl)-N-methyl-4-(methylamino)-; Theophylline impurities825; Theophylline Impurity