4-(Difluoromethyl)-3-fluoropyridine-5-sulfonyl chloride
4-(Difluoromethyl)-2-fluoropyridine-6-sulfonyl chloride
4-(Difluoromethyl)-2-fluoropyridine-3-sulfonyl chloride
3,6-Dichloro-2-(difluoromethyl)-4-fluoropyridine
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