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