2-(Difluoromethyl)-4,5-dihydroxypyridine-3-carbonyl chloride
6-(Difluoromethyl)-3,4-dihydroxypyridine-2-carbonyl chloride
5-(Difluoromethyl)-3,4-dihydroxypyridine-2-carbonyl chloride
3-(Difluoromethyl)-4,5-dihydroxypyridine-2-carbonyl chloride
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