3-Cyano-2-(difluoromethyl)-5-nitro-6-(trifluoromethoxy)pyridine
2-Cyano-4-(difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine
3-Bromo-6-nitro-4-(trifluoromethoxy)pyridine-2-acetonitrile
3-Chloro-6-cyano-2-(trifluoromethoxy)pyridine-4-carboxaldehyde