2-Bromo-6-fluoro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
5-Bromo-2-methoxy-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-Bromo-2-fluoro-3-methyl-6-(trifluoromethoxy)pyridine
2-Bromo-5-fluoro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride