4-Fluoro-2-methoxy-6-(trifluoromethoxy)pyridine-3-carboxaldehyde
4-Fluoro-2-methoxy-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
3-Fluoro-5-methoxy-6-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Fluoro-5-methoxy-2-(trifluoromethoxy)pyridine-6-carboxaldehyde