4-Bromo-6-chloro-3-cyano-2-(trifluoromethoxy)pyridine
5-Bromo-4-cyano-2-fluoro-3-(trifluoromethoxy)pyridine
4-Bromo-2-chloro-3-cyano-6-(trifluoromethoxy)pyridine
5-Bromo-3-chloro-2-cyano-4-(trifluoromethoxy)pyridine
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