3H-1,2,3-Triazolo[4,5-D]pyrimidine-5,7(4H,6H)-dione1468-26-4100 % similar 3,6-Dihydro-7H-1,2,3-triazolo[4,5-D]pyrimidin-7-one2683-90-150 % similar Uric acid69-93-250 % similar Xanthine69-89-648 % similar 8-Azaguanine134-58-742 % similar 7-Deazaxanthine39929-79-841 % similar Lumazine487-21-838 % similar Lumichrome1086-80-233 % similar 6-Bromo-1,2,4-triazine-3,5(2H,4H)-dione4956-05-233 % similar 6-Azathymine932-53-633 % similar 5,6-Dimethyluracil26305-13-532 % similar 5,6-Diaminouracil3240-72-032 % similar Cyanuric acid108-80-532 % similar 6-Thioxanthine2002-59-731 % similar