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