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