2-Cyano-3-(difluoromethyl)pyridine-4-carboxamide
4-Chloro-2-(difluoromethyl)pyridine-3-carboxamide
5-Chloro-2-(difluoromethyl)pyridine-4-carboxamide
3-Chloro-5-(difluoromethyl)pyridine-4-carboxamide
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