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