Talk:Quercitron

Yellow dye
"Quercitron was first introduced as yellow dye in 1775, but it is principally used in the form of flavin..."

What ? Have you seen the structure of quercitrin, which I assume is really near from quercitron one ? It's a flavonoïd, a molecule derived from benzopyrone; there's absolutely no link with a flavin, wich is derived from pteridine. By the way, there is strictly non mention of that in the Britannica's article. Maybe a confusion with flavone, a kind of flavonoïd ? Rhadamante (talk) 20:54, 20 June 2010 (UTC)

Structure
Originally posted at the Help Desk -- John of Reading (talk) 08:22, 13 February 2012 (UTC)

Chemical structure of quercetrin is wrong. Please double check. If you google it, you will find the correct structure. Two -OH groups were misplaced. — Preceding unsigned comment added by Principian (talk • contribs) 01:39, 13 February 2012 (UTC)
 * I have checked the chemical structure depicted in File:Quercitrin.png and it appears to be correct. It matches what is found in three chemical databases I checked:  Chemical Abstracts, PubChem, and ChemSpider. -- Ed (Edgar181) 20:21, 13 February 2012 (UTC)
 * The structural formula in the article is of Quercitr i n, not Quercitr o n. Different compounds. Narky Blert (talk) 19:18, 29 August 2017 (UTC)
 * ‘Quercitron’ is usually not considered a compound, but dye, or bark, containing quercitrin (see e.g. doi:10.1039/B305697J). However, there's even a pubchem record for a (different) ‘quercitron’ compound (not mentioned in the ref), which i consider disputable. —Mykhal (talk) 10:53, 21 August 2018 (UTC)
 * Definitely disputable. I would have expected the top ring to be in the pyrogallol rather than the dienone configuration. Narky Blert (talk) 11:00, 21 August 2018 (UTC)
 * Update: this pubchem ‘quercitron’ seems to be a glycoside of (pubchem) ‘quercetinon’. —Mykhal (talk) 11:07, 21 August 2018 (UTC)