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4-Thiouracil591-28-6100 % similar Uracil66-22-856 % similar 2,4-Dithiouracil2001-93-652 % similar 6-Hydrazinyl-2(1H)-pyrimidinone3310-41-648 % similar 4-Methyl-2-pyrimidinol monohydrochloride5348-51-647 % similar Pyrimidone557-01-742 % similar 2-Thiouracil141-90-241 % similar 2-Mercaptopyridine2637-34-537 % similar 2-Pyrimidinone hydrochloride38353-09-237 % similar 2-Mercaptopyridine73018-10-737 % similar Pyrimidine-2,4,5-triol20636-41-333 % similar Cyanuric acid108-80-532 % similar 5-Chlorouracil1820-81-131 % similar 5-Bromouracil51-20-731 % similar 5-Fluorouracil51-21-831 % similar Thymine65-71-431 % similar 5-Iodouracil696-07-131 % similar 5-Aminouracil932-52-531 % similar 2,4-Difluoropyrimidine2802-61-131 % similar 6-Thioxanthine2002-59-731 % similar