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