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