2-Cyano-4-(fluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetic acid
5-Cyano-4-fluoro-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Cyano-4-fluoro-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Cyano-2-fluoro-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride