3-Cyano-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
5-Cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxaldehyde
4-(Bromomethyl)-2-cyano-3-nitro-5-(trifluoromethoxy)pyridine
3-Cyano-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-carboxaldehyde