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