Synonyms: 3-Ethyl-2-[5-(3-ethyl-2-benzoselenazolinylidene)-1,3-pentadienyl]benzoselenazoliumiodide (6CI,7CI); Benzoselenazolium,3-ethyl-2-[5-(3-ethyl-2-benzoselenazolinylidene)-1,3-pentadienyl]-, iodide(8CI); Benzoselenazole, benzoselenazolium deriv.; Selenadicarbocyanine iodide,3,3'-diethyl-; 3,3'-Diethylselanadicarbocyanine iodide;3,3'-Diethylselenadicarbocyanine iodide; NK 1590; Selenadicarbocyanine iodide