1-Ethyl-2-(3-(1-ethyl-2-methyl-4(1H)-quinolylidene)prop-1-enyl)-4-methylquinolinium iodide 52260-69-2 Dicyanine EINECS 257-795-4 Quinolinium, 1-ethyl-2-(3-(1-ethyl-2-methyl-4(1H)-quinolinylidene)-1-propenyl)-4-methyl-, iodide