4-Amino-5-(difluoromethyl)-2-nitropyridine-3-sulfonamide
4-Amino-2-(difluoromethyl)-5-nitropyridine-3-sulfonamide
5-Amino-4-(difluoromethyl)-2-nitropyridine-3-sulfonamide
6-Amino-2-(difluoromethyl)-3-nitropyridine-4-sulfonamide
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