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