4-(Chloromethyl)-5-cyano-3-iodo-2-(trifluoromethoxy)pyridine
5-Cyano-2-(difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine
4-Cyano-5-(difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine
4-Cyano-3-(difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine