Ethyl 5-bromo-2-(difluoromethyl)-3-hydroxypyridine-4-carboxylate
Ethyl 4-bromo-3-(difluoromethyl)-6-hydroxypyridine-2-carboxylate
Ethyl 4-bromo-3-(difluoromethyl)-5-hydroxypyridine-2-carboxylate
4-Bromo-5-(difluoromethyl)-2-fluoropyridine-3-carbonyl chloride