3-(Fluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-(Fluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-(Fluoromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-(Fluoromethyl)-4-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxaldehyde