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