5-Cyano-3-(difluoromethyl)-4-hydroxypyridine-2-carboxamide
2-Cyano-4-(difluoromethyl)-3-iodopyridine-6-carboxamide
2-Cyano-4-(difluoromethyl)-3-iodopyridine-5-carboxamide
2-Cyano-3-(difluoromethyl)-6-iodopyridine-5-carboxamide
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