3-Cyano-2,6-difluoro-5-(difluoromethyl)pyridine
6-Cyano-2,4-difluoro-3-(difluoromethyl)pyridine
6-Chloro-3,4-difluoro-2-(difluoromethyl)pyridine
3-Chloro-2,5-difluoro-6-(difluoromethyl)pyridine
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