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