Flavanonols

Taxifolin ((+)-Dihydroquercetin) exhibits important anti-tyrosinase activity. Taxifolin exhibits significant inhibitory activity against collagenase with an IC₅₀ value of 193.3 μM. Taxifolin is an important natural compound with antifibrotic activity. Taxifolin is a free radical scavenger with antioxidant capacity.

Silybin is a flavonolignan isolated from milk thistle (Silybum marianum) seeds. Silybin induces apoptosis and exhibits hepatoprotective, antioxidant, anti-inflammatory, anti-cancer activity.

Isosilybin (Isosilybinin) is a flavonoid from Silybum marianum; inhibits CYP3A4 induction with an IC₅₀ of 74 μM.

Dihydromyricetin is a potent inhibitor with an IC₅₀ of 48 μM on dihydropyrimidinase. Dihydromyricetin can activate autophagy through inhibiting mTOR signaling. Dihydromyricetin suppresses the formation of mTOR complexes (mTORC1/2). Dihydromyricetin is also a potent influenza RNA-dependent RNA polymerase inhibitor with an IC₅₀ of 22 μM.

Astilbin is a flavonoid compound and enhances NRF2 activation. Astilbin also suppresses TNF-α expression and NF-κB activation.

Silybin A (Silibinin A), an effective anti-cancer and chemopreventive agent, has been shown to exert multiple effects on cancer cells, including inhibition of both cell proliferation and migration.

(-)-3-O-Acetylcatechin is a Leishmania amazonensis arginase inhibitor with an IC₅₀ of 3.7 μM. (-)-3-O-Acetylcatechin can be used for the research of leishmaniasis.

Kaempferol 3-O-rhamnoside 7-O-glucoside (Compound 5) is a flavonoid compound that can be isolated from the aerial parts of plants belonging to the genus Raphanus.

3-Hydroxyglabrol is an Antibacterial agent. 3-Hydroxyglabrol can be isolated from Glycyrrhiza glabra L. var. typica. 3-Hydroxyglabrol inhibits the growth of Staphylococcus aureus (ATCC 13709) and Mycobacterium smegmatis (ATCC 607), with a MIC of 6.25 mcg/mL. 3-Hydroxyglabrol can be used for the research of Staphylococcus aureus infection, Mycobacterium smegmatis infection.

Dihydrokaempferol is isolated from Bauhinia championii (Benth). Dihydrokaempferol induces apoptosis and inhibits Bcl-2 and Bcl-xL expression. Dihydrokaempferol is a good candidate for new antiarthritic agents.

Engeletin is a flavanonol glycoside isolated from Smilax glabra Roxb. , inhibits NF-κB signaling-pathway activation, and possesses anti-inflammatory, analgesic, diuresis, detumescence, and antibiosis effects.

Silychristin is an abundant flavonolignan present in the fruits of Silybum marianum, with antioxidant properties. Silychristin is a potent inhibitor of the thyroid hormone transporter MCT8, and elicits a strong inhibition of T3 uptake with an IC₅₀ of 110 nM.

Fustinis ((±)-Fustin; 3,7,3',4'-Tetrahydroxyflavanone) is a potent amyloid β (Aβ) inhibitor. Fustinis ((±)-Fustin; 3,7,3',4'-Tetrahydroxyflavanone) increases the expression of acetylcholine (ACh) levels, choline acetyltransferase (ChAT) activity, and ChAT gene induced by Aβ (1-42). Fustinis ((±)-Fustin; 3,7,3',4'-Tetrahydroxyflavanone) decreases in acetyl cholinesterase (AChE) activity and AChE gene expression induced by Aβ (1-42). Fustinis ((±)-Fustin; 3,7,3',4'-Tetrahydroxyflavanone) increases muscarinic M1 receptor gene expression and muscarinic M1 receptor binding activity. Fustinis ((±)-Fustin; 3,7,3',4'-Tetrahydroxyflavanone) can be used for Alzheimer's disease research.

Sanggenon C, a flavonoid, exerts protective effects against cardiac hypertrophy and fibrosis via suppression of the calcineurin/NFAT2 pathway. Sanggenon C inhibits mitochondrial fission to induce apoptosis by blocking the ERK signaling pathway. Sanggenon C inhibits inducible nitric oxide synthase expression in RAW264.7 cells, and TNF-α-stimulated cell adhesion and VCAM-1 expression, by suppressing NF-κB activity. Sanggenon C possesses antioxidant, anti-inflammatory and antitumor activities.

(±)-Silybin is the racemate of Silybin (HY-N0779A). Silybin induces apoptosis and exhibits hepatoprotective, antioxidant, anti-inflammatory, anti-cancer activity.

Cinnamtannin A2, a tetrameric procyanidin, can increases GLP-1 and insulin secretion in mice. Cinnamtannin A2 could upregulate the expression of corticotrophin releasing hormone. Cinnamtannin A2 exhibits antioxidant, anti-diabetic and nephroprotective effect.

Silybin B (Silibinin B) is an orally active amyloid-β aggregation inhibitor and ATR pathway activator that can cross the blood-brain barrier. Silybin B inhibits Aβ fibril formation and promotes amorphous aggregate formation, while activating the ATR-mediated DNA damage repair pathway and inhibiting JNK/p38 MAPK signaling. Silybin B can reduce Cisplatin (HY-17394)-induced neuronal DNA damage and apoptosis. Silybin B has anti-oxidative stress, cell cycle regulation and neuroprotective activities. Silybin B is mainly used in the study of Alzheimer's disease and Cisplatin chemotherapy-related neurotoxicity.

Isoastilbin is a dihydroflavonol glycoside compound in Rhizoma Smilacis glabrae and Astragalus membranaceus. Isoastilbin inhibits glucosyltransferase (GTase) with an IC₅₀ value of 54.3 μg/mL, and also inhibits tyrosinase activity. Isoastilbin shows neuroprotective, antioxidation, antimicrobial and anti-apoptotic properties and has the potential for Alzheimer’s disease research.

Desmethylicaritin is a phytoestrogenic molecule, has inducible effect on directional differentiation of embryonic stem cells into cardiomyocytes. Desmethylicaritin also suppresses adipogenesis via Wnt/β-catenin signaling pathway.

Taxifolin 7-O-rhamnoside (Taxifolin 7-O-α-L-rhamnoside) is a flavonoid isolated from Hypericum japonicum.