α. 1800s– quercetin, 1800s– quercetine.
β. 1800s– quercitin, 1800s– quercitine.
quercetinn.
/ˈkwəːsᵻtɪn/, U.S. /ˈkwərˌsədɪn/ Chemistry.
A yellow crystalline pigment widely distributed in plants and usually obtained by hydrolysis of quercitrin.Systematic name: 3,3′,4′,5,7-pentahydroxyflavone; C15H10O7.
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the world > matter > chemistry > organic chemistry > organic compounds > [noun] > flavones > derivatives
quercetin1856
iretol1894
flavonol1898
1856 W. Gregory Handbk. Org. Chem. (ed. 4) 355 Quercetrine..when boiled with acids, yields grape sugar, and a new body, quercetine.
1873 I. Remsen tr. R. Fittig Wöhler's Outl. Org. Chem. v. 418 Quercitin..occurs ready formed in Calluna vulgaris, in tea, in the root-bark and trunk-bark of the apple-tree and other plants.
1913 Science 2 May 679/1 The substances isolated from the plant include quercitin, dextrose, [etc.].
1949 Thorpe's Dict. Appl. Chem. (ed. 4) IX. 300/2 Quercetin gives red-brown, brown-orange, bright orange and olive-black shades on wool mordanted with chromium, aluminium, tin, and iron, respectively.
1962 T. R. Seshadri in T. A. Geissman Chem. Flavonoid Compounds ii. 9 Quercetin and its glycosides can be conveniently extracted by borax and can be liberated by acidification.
1997 Manufacturing Chemist (Nexis) Aug. 58 Its affiliate..offers a small range of products for the health food industry, including diosmine, hesperidine, quercetine, lycopin, acidophilus bifidos and glutathione yeast.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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