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