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