SEARCH Articles Figures Tables 2- Chloro-3- pyrazine 2-Amino-5-chloro-3- pyrazine 4-Amino-2-chloro-5- 4-Amino-5-methoxycarbonyl 5-Methoxycarbonyl-3- Methoxycarbonylation Methoxycarbonylations Pyrazine amino Pyrazines, chloro