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