Ethyl 6-bromo-3-(difluoromethyl)-4-fluoropyridine-2-carboxylate
Methyl 3-bromo-4-(difluoromethyl)-2-methoxypyridine-5-carboxylate
Ethyl 6-bromo-4-(difluoromethyl)-2-fluoropyridine-3-carboxylate
Methyl 3-bromo-2-(difluoromethyl)-6-methoxypyridine-4-carboxylate