5-Bromo-2-cyano-3-(difluoromethyl)pyridine-4-sulfonyl chloride
4-Bromo-2-cyano-3-(difluoromethyl)pyridine-5-sulfonyl chloride
2-Bromo-6-(difluoromethyl)-3-fluoro-4-iodopyridine
3-Bromo-5-(difluoromethyl)-6-fluoro-2-nitropyridine
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