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