Synonyms: 3H-Indolium,2-[3-(1,3-dihydro-3,3-dimethyl-1-octadecyl-2H-indol-2-ylidene)-1-propenyl]-3,3-dimethyl-1-octadecyl-(9CI); 1,1'-Dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine;3,3'-Dioctadecylindocarbocyanine; N,N'-Dioctadecyltrimethineindocarbocyanine; S27; S 27 (dye)