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