2-INDOLINONE, 3-(2-(5-HYDROXYINDOL-3-YL)-5-OXO-2-PYRROLIN-4-YLIDENE)- 3-(2-(5-Hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)-2-indolinone 4-26-00-00715 (Beilstein Handbook Reference) 548-54-9