4-Bromo-3-(difluoromethyl)-2-hydroxypyridine-6-acetonitrile
4-Bromo-6-(difluoromethyl)-2-hydroxypyridine-3-acetonitrile
3-Bromo-4-(chloromethyl)-2-(difluoromethyl)-5-hydroxypyridine
3-Bromo-2-(chloromethyl)-6-(difluoromethyl)-4-hydroxypyridine
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