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