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