2-Cyano-6-(fluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine
2-Cyano-4-(fluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine
3-(Chloromethyl)-6-cyano-2-nitro-5-(trifluoromethoxy)pyridine
3-(Chloromethyl)-4-fluoro-2-(trifluoromethoxy)pyridine-6-carboxaldehyde