Ethyl 4-bromo-3-(chloromethyl)-2-(difluoromethyl)pyridine-6-acetate
Ethyl 4-bromo-6-(chloromethyl)-2-(difluoromethyl)pyridine-3-acetate
Ethyl 4-bromo-6-(chloromethyl)-3-(difluoromethyl)pyridine-2-acetate
Ethyl 2-bromo-3-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-acetate