英文别名6,6'-Dibromo-[2,2'-biindolinylidene]-3,3'-dione; 3H-Indol-3-one, 6-bromo-2-(6-bromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-; 6,6'-Dibromoindigotin; 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; Tyrian Purple; 6,6'-dibromo-2,2'-biindole-3,3'(1H,1'H)-dione; Purple of the Ancients; Royal purple; C.I. Natural Violet 1; 6,6'-dibromo-indigotin; 6,6'-Dibromindigo 
