3-Hydroxy-4-methyl-2-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-Fluoro-5-methoxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
3-Hydroxy-2-methyl-5-(trifluoromethoxy)pyridine-6-carboxaldehyde
6-Hydroxy-4-iodo-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine