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