2-(Difluoromethyl)-4-nitro-6-(trifluoromethyl)pyridine-3-sulfonyl chloride
5-Chloro-3-cyano-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-sulfonyl chloride
3-Chloro-5-iodo-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride