Methyl 3-amino-5-(difluoromethyl)-2-iodopyridine-4-acetate
3-Amino-6-(difluoromethyl)-2-nitropyridine-4-sulfonamide
3-Amino-5-(difluoromethyl)-6-nitropyridine-2-sulfonamide
5-Amino-2-(difluoromethyl)-4-nitropyridine-3-sulfonamide
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