2-Fluoro-4-hydroxy-3-nitro-6-(trifluoromethoxy)pyridine
3-Cyano-5-(fluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine
2-Cyano-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetonitrile
2-Cyano-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetonitrile