Shindy, H. A. published the artcileNew cyanine dyes from 4,9-dioxopiperidino[2,3-g]-1,2,3,4,6,7,8,9-octahydroquinolinoquinone, Computed Properties of 606-55-3, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (2001), 40B(5), 426-429, database is CAplus.
Sym. bis(styryl, tetramethine, azastyryl) cyanine dyes containing arylidene, heterylidene, and schiff base moieties have been obtained by the interaction of 4,9-dioxopiperidino[2,3-g]-1,2,3,4,6,7,8,9-octahydroquinolinoquinone with aromatic aldehyde, heterocyclic aldehyde and nitroso compounds followed by condensation with 2(4)-Me quaternary ethiodide salts. The UV spectra in 95% ethanol of all the synthesized cyanine dyes show that the photosensitization of the dyes increases (or decreases) by increasing (or decreasing) conjugation, by the presence of electron donating (attracting) groups and the more (less) planarity of the dyes. The new compounds have been identified by elemental anal. and IR and 1H NMR spectral data.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C6H13I, Computed Properties of 606-55-3.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com