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