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