4-Cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxaldehyde
3-Fluoro-2-hydroxy-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
3-Cyano-4-fluoro-2-nitro-6-(trifluoromethoxy)pyridine
6-Fluoro-2-hydroxy-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine