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