Ombuin

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title: "Ombuin" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["o-methylated-flavonols", "triols"] topic_path: "general/o-methylated-flavonols" source: "https://en.wikipedia.org/wiki/Ombuin" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 449569995 | Name = Ombuin | ImageFile = Ombuin.svg | ImageName = Chemical structure of ombuin | IUPACName = 3,3′,5-Trihydroxy-4′,7-dimethoxyflavone | SystematicName = 3,5-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-1-benzopyran-4-one | OtherNames = 4′,7-Dimethylquercetin 7,4′-Di-O-methylquercetin 4′,7-Dimethoxy-3,3′,5-trihydroxyflavone |Section1={{Chembox Identifiers | CASNo_Ref = | CASNo = 529-40-8 | UNII_Ref = | UNII = Z3K3F0YR3W | CASNoOther = | PubChem = 5320287 | ChEBI_Ref = | ChEBI = 67493 | SMILES = COC1=C(C=C(C=C1)C2=C(C(=O)C3=C(C=C(C=C3O2)OC)O)O)O | ChemSpiderID_Ref = | ChemSpiderID = 4478412 | InChI = 1/C17H14O7/c1-22-9-6-11(19)14-13(7-9)24-17(16(21)15(14)20)8-3-4-12(23-2)10(18)5-8/h3-7,18-19,21H,1-2H3 | InChIKey = BWORNNDZQGOKBY-UHFFFAOYAW | StdInChI_Ref = | StdInChI = 1S/C17H14O7/c1-22-9-6-11(19)14-13(7-9)24-17(16(21)15(14)20)8-3-4-12(23-2)10(18)5-8/h3-7,18-19,21H,1-2H3 | StdInChIKey_Ref = | StdInChIKey = BWORNNDZQGOKBY-UHFFFAOYSA-N | MeSHName = |Section2={{Chembox Properties | Formula = C17H14O7 | MolarMass = 330.29 g/mol | Appearance = | Density = | MeltingPt = | BoilingPt = | Solubility =

Ombuin is an O-methylated flavonol, a type of flavonoid. It is the 4',7-O-methyl derivative of quercetin.

Ombuin can be found in species of the genus Erythroxylum. It can also be synthesized. Ombuin 3-sulfate can be isolated from Flaveria chlorifolia.

Glycosides

Ombuin-3-rutinoside can be isolated from Phytolacca dioica, the ombu tree. Ombuin-3-O-rhamnosylglucoside can be found in Erythroxylum rufum.

Other glycosides (ombuosides) :

References

References

  1. (February 2019)
  2. Ombuin 3-sulphate from Flaveria chloraefolia. Denis Barron and Ragai K. Ibrahim, Phytochemistry, Volume 27, Issue 7, 1988, pages 2362-2363, {{doi. 10.1016/0031-9422(88)80166-3
  3. [https://archive.today/20130105154637/http://www3.interscience.wiley.com/journal/112293631/abstract Über die Synthese von Quercetin-3-glykosiden, II. Synthese des Ombuosids und eine rationelle Synthese von Rutin. Ludwig Hörhammer, Hildebert Wagner, Hans-Günther Arndt, Gustav Hitzler, Lorand Farkas, Chemische Berichte, Volume 101 Issue 4, Pp 1183-1185, 1968] (German)
  4. Flavonoids of Erythroxylum rufum and Erythroxylum ulei. Bruce A. Bohm, David W. Phillips and Fred R. Gander, J. Nat. Prod., 1981, volume 44, issue 6, pages 676–679, {{doi. 10.1021/np50018a009

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o-methylated-flavonolstriols