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