3-(Difluoromethyl)-4-methoxypyridine-2-sulfonyl chloride
5-(Chloromethyl)-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-sulfonyl chloride
3-(Chloromethyl)-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-6-sulfonyl chloride
3-(Difluoromethyl)-2-methoxypyridine-4-sulfonyl chloride