SEARCH Articles Figures Tables 2- Methyl-3-phenylpyrazine 2-Chloro-6-hydroxy-3-methyl-5-phenylpyrazine 2-Chloro-6-hydroxy-3-methyl-5-phenylpyrazine methylation 2-Chloro-6-methoxy-3-methyl-5-phenylpyrazine 2-Phenylpyrazine 3-chloro-2-methyl Chloro methylation