3-Hydroxy-5-iodo-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Fluoro-4-hydroxy-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
5-Hydroxy-4-iodo-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Hydroxy-4-iodo-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride