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