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