Synonyms: Quinolinium,1-ethyl-4-[5-(1-ethyl-4(1H)-quinolinylidene)-1,3-pentadienyl]-, iodide (9CI);Quinolinium, 1-ethyl-4-[5-(1-ethyl-4(1H)-quinolylidene)-1,3-pentadienyl]-,iodide (8CI); 1,1'-Diethyl-4,4'-dicarbocyanine iodide;1,1'-Diethyl-4,4'-quinodicarbocyanine iodide;1-Ethyl-4-[5-(1-ethyl-4(1H)-quinolinylidene)-1,3-pentadienyl]quinoliniumiodide; DDCI 4; NK 1144; Pentamethinecyanine