3-Amino-2-(difluoromethyl)-4-iodopyridine-5-carboxylic acid
3-Amino-2-(difluoromethyl)-4-nitropyridine-5-acetic acid
3-Amino-6-(difluoromethyl)-2-nitropyridine-5-acetic acid
6-Amino-2-(difluoromethyl)-4-iodopyridine-3-carboxylic acid
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