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