(Methylthio)(methyl)pyrazine (Methylthio)methylpyrazine (mixture of isomers) 2-Methyl-3(or 5 or 6)-(methylthio)pyrazine 3(or 5 or 6)-(Methylthio)-2-methylpyrazine 67952-65-2 EINECS 267-918-3 FEMA No. 3208 Methyl(methylthio)pyrazine Pyrazine, methyl(methylthio)-