Methyl 2-bromo-5-(difluoromethyl)-3-methoxypyridine-6-acetate
Ethyl 4-bromo-2-(chloromethyl)-3-(difluoromethyl)pyridine-5-carboxylate
Methyl 2-bromo-4-(difluoromethyl)-6-methoxypyridine-3-acetate
Ethyl 6-bromo-3-(chloromethyl)-4-(difluoromethyl)pyridine-2-carboxylate