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