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