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