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