6-Bromo-2-(difluoromethyl)-4-hydroxypyridine-3-sulfonyl chloride
Ethyl 6-bromo-3-(difluoromethyl)-2-iodopyridine-4-carboxylate
2-Bromo-6-(difluoromethyl)-3-hydroxypyridine-5-sulfonyl chloride
2-Bromo-5-(difluoromethyl)-6-hydroxypyridine-3-sulfonyl chloride