4-Chloro-3-hydroxy-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Chloro-6-hydroxy-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
4-Chloro-2-hydroxy-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Bromo-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetonitrile