5-Bromo-2-cyano-3-(difluoromethyl)pyridine-6-sulfonyl chloride
4-Bromo-2-cyano-3-(difluoromethyl)pyridine-6-sulfonyl chloride
Ethyl 3-bromo-2-(difluoromethyl)-5-iodopyridine-4-acetate
3-Bromo-4-cyano-2-(difluoromethyl)pyridine-6-sulfonyl chloride
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