3-(Difluoromethyl)-5-nitropyridine-4-carboxamide
3-(Difluoromethyl)-6-nitropyridine-2-carboxamide
4-(Difluoromethyl)-2-nitropyridine-3-carboxamide
2-(Difluoromethyl)-6-nitropyridine-4-carboxamide
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