4-Bromo-3-(difluoromethyl)-2-hydroxypyridine-6-sulfonyl chloride
4-Bromo-6-(difluoromethyl)-2-hydroxypyridine-3-sulfonyl chloride
4-Bromo-6-(difluoromethyl)-3-hydroxypyridine-2-sulfonyl chloride
2-Bromo-3-(difluoromethyl)-4-iodopyridine-5-methanol
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