Methyl 4-cyano-6-fluoro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 3-cyano-5-fluoro-2-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 5-cyano-4-fluoro-3-(trifluoromethoxy)pyridine-2-carboxylate
3-Chloro-4-fluoro-6-(trifluoromethoxy)pyridine-2-acetic acid