6-Methyl-2-(methylthio)pyrimidin-4-ol (CAS No.6328-58-1), its synonyms are 6-Methyl-2-methylthio-3H-pyrimidin-4-one ; 4(1H)-Pyrimidinone, 6-methyl-2-(methylthio)- ; 4-Pyrimidinol, 6-methyl-2-(methylthio)- .