5-Hydroxy-4-iodo-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Hydroxy-4-iodo-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Hydroxy-2-methoxy-3-methyl-5-(trifluoromethoxy)pyridine
4-(Chloromethyl)-2-fluoro-5-(trifluoromethoxy)pyridine-3-methanol