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