6-Hydrazinyl-2(1H)-pyrimidinone3310-41-6100 % similar Uracil66-22-850 % similar 4-Thiouracil591-28-648 % similar 4-Methyl-2-pyrimidinol monohydrochloride5348-51-642 % similar 2-Hydrazinopyridine4930-98-740 % similar Pyrimidone557-01-737 % similar 2-Hydrazinoquinoline15793-77-836 % similar 2-Pyrimidinone hydrochloride38353-09-233 % similar 5-Aminouracil932-52-532 % similar 6-Hydrazinonicotinic acid133081-24-031 % similar 2-Hydrazinylbenzothiazole615-21-431 % similar 5-Hydroxy-2,4(1H,3H)-pyrimidinedione20636-41-330 % similar