5-Cyano-2-methoxyisonicotinoyl chloride
5-Iodo-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-(Difluoromethyl)-3-nitro-6-(trifluoromethyl)pyridine-4-sulfonyl chloride
4-(Chloromethyl)-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-3-sulfonyl chloride