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