Pinacyanol2768-90-3100 % similar Pinacyanol605-91-489 % similar Quinaldine red117-92-040 % similar 1-Ethyl-2-methylquinolinium iodide606-55-333 % similar 1-Ethyl-4-[3-(1-ethyl-4(1H)-quinolylidene)propenyl]quinolinium iodide4727-50-833 % similar