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