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Kurniadi, T.H.; Rhlid, R.B.; Juillerat, M.-A.; Geffaut, T.; Bolte, J.; Berger, R.G., Total chemical synthesis of 2-ethenyl-3,5-dimethylpyrazine and 3-ethenyl-2,5-dimethylpyrazine, Tetrahedron, 2003, 59, 32, 6109-6112, https://doi.org/10.1016/S0040-4020(03)00948-7 . [all data]