ptical Dye DCY02; 2-[3-[1,3-Dihydro-1,3-dimethyl-1-(phenylmethyl)-2H-benz[e]indol-2-ylidene]-1-propenyl]-1,3-dimethyl-1-(phenylmethyl)-1H-benz[e]indolium hexafluorophosphate(1-)