3-Cyano-4-hydroxy-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
5-Fluoro-2-(fluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine
3-Cyano-2-hydroxy-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-Fluoro-5-(fluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine