2-[3-[1,3-Dihydro-1,3-Dimethyl-1-(phenylmethyl)-2H-Benz[e]indol-2-Ylidene]-1-Propen-1-Yl]-1,3-Dimethyl-1-(phenylmethyl)-1H-Benz[e]indolium Hexafluorophosphate(1-) (1:1)