SEARCH Articles Figures Tables 2-Chloro-3 -methyl-5 -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-Methoxy-3 -methyl-5 -phenylpyrazine 2-Phenylpyrazine 2.3- Dichloro-5-methyl-6-phenylpyrazine 3- Hydroxy-5-methyl-2-phenylpyrazine