2-Methylmercapto-delta(sup 2)-tetrahydropyrimidinium iodide 5445-73-8 NSC 22197 Pyrimidine, 1,4,5,6-tetrahydro-2-(methylthio)-, monohydriodide (8CI)(9CI) Pyrimidinium, 1,4,5,6-tetrahydro-2-methylthio-, iodide