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