5-Bromo-2-(difluoromethyl)-3-nitropyridine-4-sulfonyl chloride
3-Bromo-6-(difluoromethyl)-2-iodopyridine-4-carboxaldehyde
4-Bromo-3-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride
4-Bromo-3-(difluoromethyl)-5-nitropyridine-2-sulfonyl chloride
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