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Pyrazine, 2-(chloromethyl)-

4-Pyridazinecarboxylic acid, ethyl ester

3-Pyridazinecarbonitrile, 6-chloro-

3(2H)-Pyridazinone, 4-methyl-

4-Pyrimidinecarboxylic acid, 2-amino-6-methyl-

4-Pyrimidinamine, 6-chloro-5-nitro-

4-Pyrimidinecarboxaldehyde, 2,6-dichloro-

4-Pyridazinecarboxylic acid, 3-methyl-

4-Pyrimidinecarboxylic acid, 5-methyl-

Pyrazine, 2-bromo-5-chloro-

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