4-Nitro-3-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-2-acetonitrile
4-Nitro-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-acetonitrile
6-Nitro-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-acetonitrile
2-Nitro-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-acetonitrile