Ethyl 2-bromo-5-(difluoromethyl)-4-nitropyridine-3-acetate
4-Bromo-2-(difluoromethyl)-3-nitropyridine-5-sulfonyl chloride
3-Bromo-5-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride
3-Bromo-5-(difluoromethyl)-4-nitropyridine-2-sulfonyl chloride
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