3-Fluoro-2-hydroxy-5-(trifluoromethoxy)pyridine-4-carboxaldehyde
6-Fluoro-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-Hydroxy-4-methoxy-5-nitro-3-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-3-fluoro-5-(trifluoromethoxy)pyridine-4-carboxylic acid