2,3-Pyrazinecarboxylic anhydride
            ETHYL 2-QUINOXALINECARBOXYLATE
            Methyl 5-chloropyrazine-2-carboxylate
            METHYL 5-METHYLPYRAZINE-2-CARBOXYLATE
            Methyl 3,5-diamino-6-chloropyrazine-2-carboxylate
            2-Pyrazinecarboxylic acid
            2-(ETHOXYCARBONYL)-3-METHYLQUINOXALINEDIIUM-1,4-DIOLATE
            2-(METHOXYCARBONYL)-3-METHYLQUINOXALINEDIIUM-1,4-DIOLATE
        
    
 
          

