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