3-Chloro-2-cyano-6-(difluoromethyl)pyridine-5-carboxylic acid
2-Chloro-5-cyano-4-(difluoromethyl)pyridine-3-carboxylic acid
4-Chloro-3-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride
6-Chloro-4-cyano-2-(difluoromethyl)pyridine-3-carboxylic acid
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