2-(Difluoromethyl)-3-nitro-5-(trifluoromethyl)pyridine-4-carboxaldehyde
4-(Difluoromethyl)-3-nitro-6-(trifluoromethyl)pyridine-2-carboxaldehyde
3-(Difluoromethyl)-6-nitro-2-(trifluoromethyl)pyridine-4-methanol
4-(Difluoromethyl)-3-nitro-5-(trifluoromethyl)pyridine-2-carboxaldehyde