4-Bromo-3-chloro-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-Bromo-5-chloro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-Bromo-4-chloro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-4-chloro-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride