5-Fluoro-3-hydroxy-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-(Chloromethyl)-3-hydroxy-4-methoxy-5-(trifluoromethoxy)pyridine
3-Fluoro-5-hydroxy-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Fluoro-4-hydroxy-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride