3-Bromo-5-cyano-2-(difluoromethyl)pyridine-6-carboxaldehyde
3-Bromo-2-(difluoromethyl)-4-hydroxypyridine-5-sulfonyl chloride
5-Bromo-4-cyano-2-(difluoromethyl)pyridine-3-carboxaldehyde
2-Bromo-6-(difluoromethyl)-5-hydroxypyridine-3-sulfonyl chloride
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