5-Chloro-2-cyano-3-(trifluoromethoxy)pyridine-6-acetonitrile
6-Bromo-4-cyano-3-(difluoromethyl)pyridine-2-sulfonamide
3-Bromo-2-(difluoromethyl)-6-iodopyridine-4-acetonitrile
2-Fluoro-4-hydroxy-3-(trifluoromethoxy)pyridine-5-acetonitrile
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