4-(Difluoromethyl)-2,3,5-trihydroxypyridine
6-(Difluoromethyl)-2,3,4-trihydroxypyridine
5-(Difluoromethyl)-2,3,4-trihydroxypyridine
6-(2,5-Dichlorophenyl)-3-hydroxy-2-(trifluoromethyl)pyridine
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