3-Chloro-6-cyano-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Chloro-2-(chloromethyl)-6-iodo-3-(trifluoromethoxy)pyridine
4-Chloro-2-(chloromethyl)-3-iodo-6-(trifluoromethoxy)pyridine
5-Chloro-2-cyano-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride