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