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