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