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
Ethyl 4-bromo-3-(difluoromethyl)-2-hydroxypyridine-5-carboxylate