2-Bromo-3-(difluoromethyl)-6-nitro-4-(trifluoromethoxy)pyridine
2-Bromo-5-iodo-6-nitro-3-(trifluoromethoxy)pyridine
2-Bromo-5-iodo-4-nitro-3-(trifluoromethoxy)pyridine
3-Bromo-6-(fluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine
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