1-Ethyl-2-((1-ethyl-4(1H)-quinolylidene)methyl)quinolinium iodide 1-Ethyl-2-(1-ethyl-4-methenyl)quinolinylquinolinium iodide 151541-10-5 156972-77-9 40428-28-2 634-21-9 EINECS 211-205-1 Ethyl red Ethyl red iodide NSC 5491 Quinolinium, 1-ethyl-2-((1-ethyl-4(1H)-quinolinylidene)methyl)-, iodide