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