5-(Difluoromethyl)-3-hydroxypyridine-2-carboxylic acid
3-(Difluoromethyl)-5-hydroxypyridine-4-carboxylic acid
3-(Difluoromethyl)-5-hydroxypyridine-2-carboxylic acid
5-(Difluoromethyl)-4-hydroxypyridine-2-carboxylic acid
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