6-Difluoromethoxy-2-fluoropyridine-3-sulfonyl chloride
5-Difluoromethoxy-4-fluoropyridine-2-sulfonyl chloride
5-Difluoromethoxy-3-fluoropyridine-2-sulfonyl chloride
5-Difluoromethoxy-2-fluoropyridine-4-sulfonyl chloride
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