Ethyl 4-cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-5-acetate
Ethyl 4-cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 2-chloro-3-cyano-5-(trifluoromethoxy)pyridine-4-carboxylate
4-Chloro-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetonitrile