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