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