4-Cyano-3-(difluoromethyl)-2-hydroxy-5-nitropyridine
4-Chloro-3-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine
Methyl 2-cyano-6-(difluoromethyl)-4-methoxypyridine-3-carboxylate
4-Amino-3-chloro-6-(trifluoromethoxy)pyridine-2-carboxylic acid
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