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