2-Amino-3-bromo-4-(difluoromethyl)pyridine-6-sulfonamide
3-Amino-5-chloro-2-(difluoromethyl)-6-iodopyridine
3-Amino-4-chloro-6-(difluoromethyl)-2-iodopyridine
5-Amino-3-(difluoromethyl)-4-fluoropyridine-2-acetic acid
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