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