5-Hydroxyoxindole, 5-hydroxy-2-oxindole, 1,3-dihydro-5-hydroxy-2H-Indol-2-one, 5-Hydroxy-1,3-dihydro-indol-2-one, 5-Hydroxy-1,3-dihydro-2H-indol-2-one, 5-hydroxy-2-indolone, 5-hydroxyindolin-2-one, 2,3-Dihydro-5-hydroxyindol-2-one, 5-hydroxy-2-indolinone, 5-hydroxyindol-2-one, 5-HYDROXY-2-OXYINDOLE, 3H-5-hydroxyindole