4-(Difluoromethyl)-2,3-dihydroxy-5-iodopyridine
4-(Difluoromethyl)-3,5-dihydroxy-2-fluoropyridine
2-(Difluoromethyl)-3,5-dihydroxy-6-fluoropyridine
2-(Difluoromethyl)-3,5-dihydroxy-4-fluoropyridine
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