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