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