3-(Chloromethyl)-4-cyano-5-fluoro-2-(trifluoromethoxy)pyridine
3-(Chloromethyl)-2-cyano-6-fluoro-5-(trifluoromethoxy)pyridine
6-(Chloromethyl)-2-cyano-3-fluoro-4-(trifluoromethoxy)pyridine
4-Chloro-6-hydroxy-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride