Methyl 2-amino-6-(difluoromethyl)-3-nitropyridine-4-carboxylate
Methyl 6-amino-4-(difluoromethyl)-3-nitropyridine-2-carboxylate
4-Amino-5-(difluoromethyl)-3-nitropyridine-2-carboxylic acid
2-Amino-4-(difluoromethyl)-3-nitropyridine-5-acetic acid
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