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