3-(Chloromethyl)-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-sulfonyl chloride
5-(Chloromethyl)-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-sulfonyl chloride
4-(Bromomethyl)-3-(difluoromethyl)pyridine
4-(Chloromethyl)-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-sulfonyl chloride