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Xanthine69-89-6100 % similar 6-Thioxanthine2002-59-763 % similar 2-Thioxanthine2487-40-363 % similar Hypoxanthine68-94-055 % similar N2-Acetylguanine19962-37-951 % similar 3H-1,2,3-Triazolo[4,5-d]pyrimidine-5,7(4H,6H)-dione1468-26-448 % similar 7-Deazaxanthine39929-79-848 % similar Uric acid69-93-248 % similar Lumazine487-21-845 % similar Guanine73-40-543 % similar Guanine hydrochloride635-39-240 % similar 3-Methylxanthine1076-22-839 % similar 1-Methylxanthine6136-37-439 % similar 3,9-Dihydro-1H-purine-2,6-dithione5437-25-239 % similar Pterin2236-60-437 % similar Pyrimidine-2,4,5-triol20636-41-336 % similar Lumichrome1086-80-236 % similar Guanine sulfate10333-92-336 % similar 5-Chlorouracil1820-81-134 % similar 5-Bromouracil51-20-734 % similar