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