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