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