37187-86-3 4,4'-(3-((1-Ethyl-4(1H)-quinolylidene)ethylidene)prop-1-ene-1,3-diyl)bis(1-ethylquinolinium) diiodide 40880-91-9 4846-34-8 80893-93-2 Cryptocyanine O.A.1 EINECS 225-436-0 NK 4 NSC 36412 Quinolinium, 4,4'-(3-((1-ethyl-4(1H)-quinolinylidene)ethylidene)-1-propene-1,3-diyl)bis(1-ethyl-, diiodide