SEARCH Articles Figures Tables 2-pyrazinecarboxylate 3-Amino-5-methyl-2-pyrazinecarboxylic 5-Methyl-2-pyrazinecarboxylic acid 4-oxide Methyl 2-pyrazinecarboxylate 1-oxide Methyl 2-pyrazinecarboxylate hydrolysis Methyl 3-amino-2-pyrazinecarboxylate Methyl 3-azido-2-pyrazinecarboxylate Methyl 3-nitro-2-pyrazinecarboxylate Methyl 5-pentyl-2-pyrazinecarboxylate Methyl 6-chloro-5- -2-pyrazinecarboxylate Methyl-pyrazinecarboxylic acid