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