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Flavonoids and polyphenols

Ombuin

Also known as 4',7-Dimethoxy-3,3',5-trihydroxyflavone, 7,4'-Di-O-methylquercetin, 4',7-Dimethylquercetin

CAS 529-40-8Formula C17H14O7Molar mass 330.29 g/mol
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Ombuin chemical structure, C17H14O7, CAS 529-40-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
529-40-8
Formula
C17H14O7
Molar mass
330.29 g/mol
HS code
293299
Category
Flavonoids and polyphenols

What is Ombuin?

Plain description, key identifiers and synonyms

Ombuin is a dimethoxyflavone that is quercetin in which the hydroxy groups at positions 7 and 4' are replaced by methoxy groups. Isolated from Cyperus teneriffae, it exhibits anti-inflammatory activity. It has a role as an anti-inflammatory agent and a plant metabolite. It is a dimethoxyflavone, a trihydroxyflavone and a member of flavonols. It is functionally related to a quercetin. It is a conjugate acid of a 7,4'-O-dimethylquercetin 3-olate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxychromen-4-one
CAS number
529-40-8 CAS number cross-checked
Molecular formula
C17H14O7
UNII
Z3K3F0YR3W
InChIKey
BWORNNDZQGOKBY-UHFFFAOYSA-N
InChI
InChI=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
SMILES (canonical and isomeric)
COC1=C(C=C(C=C1)C2=C(C(=O)C3=C(C=C(C=C3O2)OC)O)O)O

Synonyms

  • 4',7-Dimethoxy-3,3',5-trihydroxyflavone
  • 7,4'-Di-O-methylquercetin
  • 4',7-Dimethylquercetin
  • quercetin 7,4'-dimethyl ether
  • Quercetin 4',7-dimethyl ether
  • 3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxychromen-4-one
  • 3,5,3'-Trihydroxy-7,4'-dimethoxyflavone
  • 4H-1-Benzopyran-4-one, 3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-
  • 3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-1-benzopyran-4-one
  • Ombuine
  • 3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-chromen-4-one
  • Flavone, 4',7-dimethoxy-3,3',5-trihydroxy-
  • 3,5-Dihydroxy-2-(3-hydroxy-4-methoxy-phenyl)-7-methoxy-chromen-4-one
  • 7,4'-dimethylquercetin
  • 4'',7-dimethylquercetin
  • quercetin-7,4'-dimethylether
  • kaempferol-7,4'-dimethylether
  • quercetin-7,4''-dimethyl ether
  • di-o-Methylquercetin, 7,4'-
  • 5-18-05-00498 (Beilstein Handbook Reference)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
330.29 g/molcalc.
Exact mass
330.074 Dacalc.
LogP (octanol/water)
2.59calc.
Topological polar surface area
109.4 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
3calc.
Heavy atoms
24calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.12calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1cc(-c2ccccc2)oc2ccccc12

O=c1cc(-c2ccccc2)oc2ccccc12

3 rings, 17 atoms, the Flavone ring system.

2,273 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Ombuin suppliers

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Ombuin price

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Uses and applications

What the substance is used for, by industry and function

Roles

  • anti-inflammatory agent
  • eukaryotic metabolite
  • metabolite
  • plant metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Ombuin is traded under.

HS 2932.99Indicative HS code

Heterocyclic compounds with oxygen hetero-atom(s) only, other

World exports in 2024
$3.81B
+10.3% vs 2023, imports $7.05B
2019 to 2024
Top exporters
  1. China28.9%
  2. Switzerland * partner reported12.7%
  3. Germany7.8%
Top importers
  1. United States49.7%
  2. China11.9%
  3. India * partner reported3.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Ombuin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ombuin, based on the data on this page

What is Ombuin?

Ombuin is a dimethoxyflavone that is quercetin in which the hydroxy groups at positions 7 and 4' are replaced by methoxy groups. Isolated from Cyperus teneriffae, it exhibits anti-inflammatory activity. It has a role as an anti-inflammatory agent and a plant metabolite.

What is the CAS number of Ombuin?

The CAS registry number of Ombuin is 529-40-8.

What is the molecular formula and weight of Ombuin?

The molecular formula of Ombuin is C17H14O7 and its molar mass is 330.29 g/mol.

What is Ombuin used for?

Known uses and roles of Ombuin include anti-inflammatory agent, eukaryotic metabolite, metabolite and plant metabolite.

Is Ombuin hazardous?

No GHS hazard classification for Ombuin is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Ombuin?

Ombuin is usually classified under HS code 293299 (Heterocyclic compounds with oxygen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ombuin?

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What is the price of Ombuin?

Suppliers quote Ombuin on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Ombuin

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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