4-Cyano-3-nitro-6-(trifluoromethoxy)pyridine-2-sulfonamide
3-Cyano-2-iodo-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-(Aminomethyl)-6-cyano-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine
2-Cyano-6-iodo-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride