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