3-Amino-2-(chloromethyl)-6-(difluoromethyl)-4-nitropyridine
4-Amino-2-(aminomethyl)-5-(difluoromethyl)-3-iodopyridine
2-Amino-6-(chloromethyl)-5-(difluoromethyl)-3-nitropyridine
2-Amino-5-(difluoromethyl)-6-iodo-3-methylpyridine
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