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