2-Amino-6-cyano-3-(difluoromethyl)-4-fluoropyridine
4-Amino-2-bromo-5-(difluoromethyl)-3-iodopyridine
5-Amino-3-bromo-2-(difluoromethyl)-4-iodopyridine
5-Amino-4-bromo-2-(difluoromethyl)-3-iodopyridine
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