Synonyms: 1-Ethyl-2-[7-(1-ethyl-2(1H)-quinolylidene)-1,3,5-heptatrienyl]quinoliniumiodide (6CI,7CI); Quinolinium,1-ethyl-2-[7-(1-ethyl-2(1H)-quinolinylidene)-1,3,5-heptatrienyl]-, iodide(9CI); Quinolinium,1-ethyl-2-[7-(1-ethyl-2(1H)-quinolylidene)-1,3,5-heptatrienyl]-, iodide (8CI);2,2'-Quinotricarbocyanine iodide, 1,1'-diethyl- (7CI);1,1'-Diethyl-2,2'-quinotricarbocyanine iodide;1,1'-Diethyl-2,2'-tricarbocyanine iodide; 1,1'-Diethylquinotricarbocyanineiodide; NK 123