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