4-Bromo-2-(difluoromethyl)-3-hydroxypyridine-6-sulfonyl chloride
3-Bromo-6-(difluoromethyl)-2-iodopyridine-5-acetonitrile
5-Bromo-2-(difluoromethyl)-4-iodopyridine-3-acetonitrile
5-Bromo-3-(difluoromethyl)-2-hydroxypyridine-4-sulfonyl chloride
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