2-Bromo-3-cyano-5-(difluoromethyl)-6-methoxypyridine
3-Bromo-6-cyano-4-(difluoromethyl)-2-iodopyridine
5-Bromo-2-cyano-3-(difluoromethyl)-4-iodopyridine
4-Bromo-5-cyano-3-(difluoromethyl)-2-iodopyridine
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