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