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