Ethyl 6-(difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 3-(difluoromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine-6-acetate
Methyl 4-iodo-2-nitro-3-(trifluoromethoxy)pyridine-6-acetate
Ethyl 2-(difluoromethyl)-6-hydroxy-4-(trifluoromethoxy)pyridine-3-carboxylate