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