4-(Difluoromethyl)-3-fluoro-2-hydroxypyridine-6-carboxylic acid
6-Cyano-2-(difluoromethyl)-3-methoxypyridine
2-Chloro-3-cyano-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine
4-Bromo-6-hydroxypicolinaldehyde
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