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