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