1,1'-Diethyl-2,2'-cyanine 1-Ethyl-2-((1-ethyl-2(1H)-quinolylidene)methyl)quinolinium 1613-31-6 20766-49-8 2402-42-8 977-96-8 Decynium 22 Diethylpseudoisocyanine Pseudocyanine Pseudoisocyanine Quinolinium, 1-ethyl-2-((1-ethyl-2(1H)-quinolinylidene)methyl)-