5-Bromo-2-cyano-4-(difluoromethyl)-3-methylpyridine
4-Bromo-3-cyano-5-(difluoromethyl)-2-iodopyridine
3-Bromo-4-chloro-6-(difluoromethyl)pyridine-2-acetonitrile
4-Bromo-3-cyano-5-(difluoromethyl)-2-methylpyridine
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