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