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