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