Ethyl 3-(difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 5-iodo-2-methyl-4-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-(difluoromethyl)-6-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 4-iodo-5-methyl-2-(trifluoromethoxy)pyridine-3-carboxylate