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