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