2-Amino-5-bromo-3-fluoropyridine
4-Bromo-3-fluoropyridine-2-sulfonyl chloride
3-(Difluoromethyl)-2-hydroxy-4-iodopyridine-6-sulfonyl chloride
2-(Difluoromethyl)-4-hydroxy-3-iodopyridine-6-sulfonyl chloride
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