4-Bromo-3-fluoro-6-(trifluoromethoxy)pyridine-2-carboxaldehyde
2-(Chloromethyl)-3-(difluoromethyl)pyridine-4-carboxaldehyde
Ethyl 2-chloro-4-(difluoromethyl)-3-iodopyridine-6-carboxylate
3-(Chloromethyl)-4-cyano-6-(trifluoromethoxy)pyridine-2-carboxaldehyde