| 英文同义词: | 2,3,6,7-Tetrahydro-1,3-dimethyl-2,6-dioxo-1H-purine-8-butyric acid;4-[(1,3-Dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin)-8-yl]butanoic acid;8-(3-Carboxypropyl)theophyline;Theophyline-8-butyric acid;8-(3-CARBOXYPROPYL)-1,3-DIMETHYLXANTHINE;4-(1,3-dimethyl-2,6-dioxo-7H-purin-8-yl)butanoic acid;4-(2,6-diketo-1,3-dimethyl-7H-purin-8-yl)butyric acid;2,3,6,7-tetrahydro-1,3-dimethyl-2,6-dioxo-1h-purine-8-butanoicaci |