1,3-Dihydro-3-hydroxy-2H-indol-2-one 2-Indolinone, 3-hydroxy- 2H-INDOL-2-ONE, 1,3-DIHYDRO-3-HYDROXY- 3-Hydroxy-2-oxoindole 5-21-12-00189 (Beilstein Handbook Reference) 61-71-2 BRN 0082628 Dioxindole NSC 26319 Oxindole, 3-hydroxy- (6CI)