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