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