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