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