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5-Formyl-2-picoline

2-Methoxypyridine-4-carboxaldehyde

4-Fluoro-3-picoline

3-Fluoro-4-nitropyridine N-oxide

2-Fluoro-4-formylpyridine

2,6-Dimethyl-3-nitropyridine

4,6-Dihydroxynicotinic acid ethyl ester

2,5-Dichloro-4-formylpyridine

2,3-Dichloro-4-formylpyridine

2,3-Dibromo-5-nitropyridine