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