4-Bromo-3-(difluoromethyl)-2-hydroxy-6-nitropyridine
4-Bromo-6-(difluoromethyl)-2-hydroxy-3-nitropyridine
4-Bromo-2-(difluoromethyl)-3-hydroxy-6-nitropyridine
5-Bromo-3-(difluoromethyl)-2-hydroxy-4-nitropyridine
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