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