Ethyl 2-cyano-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-5-acetate
Methyl 5-cyano-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetate
Methyl 5-cyano-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-acetate
Methyl 2-cyano-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetate