3-Bromo-4-cyano-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
2-Bromo-6-cyano-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
2-Bromo-5-chloro-3-iodo-4-(trifluoromethoxy)pyridine
2-Bromo-3-chloro-4-iodo-5-(trifluoromethoxy)pyridine
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