1H-Indole-5-sulfonic acid,3-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-2,3-dihydro-2-oxo-

1H-Indole-5-sulfonic acid,3-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-2,3-dihydro-2-oxo- · CAS 244021-67-8