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