All Photos(1)




≥95.0% (HPLC)

3′-Methylquercetin, Isorhamnetol, 3,4′,5,7-Tetrahydroxy 3′-methoxyflavone, 3′-Methoxy-3,4′,5,7-tetrahydroxyflavone, Quercetin 3′-methyl ether
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:


≥95.0% (HPLC)

SMILES string




InChI key


Looking for similar products? Visit Product Comparison Guide

General description

Isorhamnetin is an O-methylated flavonol found in fruits, plants, and medicinal herbs. It is a metabolite of quercetin.


Isorhamnetin (IRN) has been used:
  • as a neuroprotective agent to test its effect on scopolamine-induced cortico-hippocampal learning and memory deficiency in mice
  • as a reference standard in quadrupole time-of-flight mass spectrometry (QTOF MS) to analyze and quantify the phenolic compounds present in honey extract
  • as a reference standard to determine the phenolic profile of Artemisia species using Reversed-phase high-performance liquid chromatography with diode array detection and electrospray ionization mass spectrometry (RP-HPLC-DAD-ESI-TQ-MS/MS)

Biochem/physiol Actions

Isorhamnetin inhibits adipogenesis by interfering with differentiation of adipose stem cells, by a mechanism involving stabilization of β-catenin and up-regulating the Wnt signaling pathway.
Isorhamnetin exerts antioxidant, anti-inflammatory, anti-cancer, anti-bacterial, and anti-viral effects. It has shown to be a potential neuroprotective agent by inhibiting neurodegeneration in the hippocampus under Diabetes mellitus (DM) conditions. Isorhamnetin at low levels may serve as an anti-diabetic agent by promoting glucose uptake in skeletal muscle cells and maintaining glucose homeostasis in hyperglycemic conditions. It regulates cell signaling pathways such as Nuclear factor kappa B (NF-κB), phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT), mitogen-activated protein kinase (MAPK) etc. Isorhamnetin elicits protective and therapeutic effects on atherosclerosis and cardiovascular diseases.


Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. 17794.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

Gang Gong et al.
Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie, 128, 110301-110301 (2020-06-06)
Isorhamnetin is one of the most important active ingredients in the fruits of Hippophae rhamnoides L. and the leaves of Ginkgo biloba L., which possesses extensive pharmacological activities. At present, there have been numerous investigations on isorhamnetin, which has the
Quercetin and its metabolite isorhamnetin promote glucose uptake through different signalling pathways in myotubes
Jiang H, et al.,
Scientific Reports, 1-15 (2019)
Lutz Franke et al.
Journal of medicinal chemistry, 50(11), 2640-2646 (2007-04-28)
A natural product collection and natural-product-derived combinatorial libraries were virtually screened for potential inhibitors of human 5-lipoxygenase (5-LO) activity. We followed a sequential ligand-based approach in two steps. First, similarity searching with a topological pharmacophore descriptor (CATS 2D method) was
Rongsheng E Wang et al.
Journal of medicinal chemistry, 52(7), 1912-1921 (2009-03-20)
Inhibitors of heat-induced heat shock protein 70 (HSP70) expression have the potential to enhance the therapeutic effectiveness of heat-induced radiosensitization of tumors. Among known small molecule inhibitors, quercetin has the advantage of being easily modified for structure-activity studies. Herein, we
Nida Jamali-Raeufy et al.
Journal of chemical neuroanatomy, 102, 101709-101709 (2019-11-08)
Isorhamnetin, a derivative of quercetin, exerts antioxidant and anti-inflammatory effects in different diseases, and we examined its protective effects against diabetes-related changes in the brain. A single dose of a freshly prepared solution of streptozotocin (STZ) (60 mg/kg body weight) was


Dietary Antioxidants

Antioxidants protect biological systems from oxidative damage produced by oxygen-containing free radicals and from redoxactive transition metal ions such as iron, copper, and cadmium.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service