英文别名Doxofylline Impurity 4; 1-((1,3-Dioxolan-2-yl)methyl)-4-(1,3-dimethylureido)-1H-imidazole-5-carboxylic Acid; 1-(1,3-Dioxolan-2-ylmethyl)-4-[methyl[(methylamino)carbonyl]amino]-1H-imidazole-5-carboxylic acid; 1H-Imidazole-5-carboxylic acid, 1-(1,3-dioxolan-2-ylmethyl)-4-[methyl[(methylamino)carbonyl]amino]-; Theophylline impurities823; Theophylline Impurity5; 1-((1,3-dioxolan-2-yl)methyl)-4-(3-methylureido)-1H-imidazole-5-carboxylic acid 
