5-Hydroxyoxindole

5-Hydroxyoxindole is a structural analog of uric acid for its antioxidant. 5-Hydroxyoxindole has DPPH radical scavenging activities and lipid peroxidation-inhibitory activities. 5-Hydroxyoxindole is a product of partial metabolism of tryptophan involving conversion in the gut lumen of tryptophan to indole through the action of bacterial tryptophanase and tryptophan synthase. 5-Hydroxyoxindole is one of the main molecules responsible for the neurological symptoms of hepatic encephalopathy in rats. 5-Hydroxyoxindole can be used for the research of oxidative stress-mediated disorders[1][2].