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