Methyl 2-cyano-5-nitro-4-(trifluoromethoxy)pyridine-3-acetate
4-Fluoro-2-nitro-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
Methyl 6-cyano-4-nitro-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 2-fluoro-6-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate