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