Methyl 2-cyano-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-acetate
Ethyl 3-cyano-4-(fluoromethyl)-2-(trifluoromethoxy)pyridine-6-acetate
Ethyl 2-cyano-6-(fluoromethyl)-5-(trifluoromethoxy)pyridine-3-acetate
3-Cyano-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-acetic acid