2-(Difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
3-(Difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-(Bromomethyl)-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-methanol
6-(Difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde