2,3-Diamino-6-(difluoromethyl)-4-nitropyridine
3,4-Diamino-2-(difluoromethyl)-6-iodopyridine
2,3-Diamino-4-(difluoromethyl)-6-nitropyridine
2,6-Diamino-3-(difluoromethyl)-5-iodopyridine
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