4-Cyano-5-fluoro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
5-Cyano-4-fluoro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Fluoro-5-methoxy-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
6-Cyano-2-fluoro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride