3-Cyano-2-nitro-6-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
3-Cyano-2-nitro-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-Cyano-2-nitro-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
6-Cyano-2-nitro-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine