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