4-Cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
4-Cyano-5-methyl-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
5-Cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
Methyl 3-(chloromethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-4-carboxylate