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