Methyl 5-cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
Ethyl 3-cyano-4-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
2-Cyano-4-(fluoromethyl)-5-nitro-3-(trifluoromethoxy)pyridine
2-Cyano-3-(fluoromethyl)-6-nitro-5-(trifluoromethoxy)pyridine