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