19201-53-7

C.I.75800 Royal purple Tyrian Purple 6,6'-DibroMoindigo C.I. Natural Violet 1 6,6'-Dibromoindigotin Purple of the Ancients 6,6'-dibromo-2,2'-biindole-3,3'(1H,1'H)-dione 6,6'-Dibromo-Δ2,2'-bi(2H-indole)-3,3'(1H,1'H)-dione 6-Bromo-2-(6-bromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one 6-Bromo-2-(6-bromo-2,3-dihydro-3-oxo-1H-indol-2-ylidene)-2,3-dihydro-1H-indol-3-one 3H-Indol-3-one, 6-bromo-2-(6-bromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-