Flavonoids (or bioflavonoids) are a class of plant and fungus secondary metabolites. Chemically, flavonoids have the general structure of a 15-carbon skeleton, which consists of two phenyl rings (A and B) and heterocyclic ring (C). This carbon structure can be abbreviated C6-C3-C6. They can be classified into: flavonoids or bioflavonoids, isoflavonoids, neoflavonoids. Flavonoids are widely distributed in plants, fulfilling many functions. Flavonoids are the most important plant pigments for flower coloration, producing yellow or red/blue pigmentation in petals designed to attract pollinator animals. In higher plants, flavonoids are involved in UV filtration, symbiotic nitrogen fixation and floral pigmentation. They may also act as chemical messengers, physiological regulators, and cell cycle inhibitors. In addition, some flavonoids have inhibitory activity against organisms that cause plant diseases.


Anti-infection >
Arenavirus Bacterial CMV Enterovirus Filovirus Fungal HBV HCV HIV HSV Influenza Virus Parasite Reverse Transcriptase RSV SARS-CoV
Antibody-drug Conjugate >
ADC Cytotoxin ADC Linker Drug-Linker Conjugates for ADC PROTAC-linker Conjugate for PAC
Apoptosis >
Apoptosis Bcl-2 Family c-Myc Caspase DAPK Ferroptosis IAP MDM-2/p53 PKD RIP kinase Survivin Thymidylate Synthase TNF Receptor
Autophagy >
Autophagy LRRK2 ULK Mitophagy
Cell Cycle/DNA Damage >
Antifolate APC ATM/ATR Aurora Kinase Casein Kinase CDK Checkpoint Kinase (Chk) CRISPR/Cas9 Deubiquitinase DNA Alkylator/Crosslinker DNA-PK DNA/RNA Synthesis Eukaryotic Initiation Factor (eIF) G-quadruplex Haspin Kinase HDAC HSP IRE1 Kinesin LIM Kinase (LIMK) Microtubule/Tubulin Mps1 Nucleoside Antimetabolite/Analog p97 PAK PARP PERK Polo-like Kinase (PLK) PPAR RAD51 ROCK Sirtuin SRPK Telomerase TOPK Topoisomerase Wee1
Cytoskeleton >
Arp2/3 Complex Dynamin Gap Junction Protein Integrin Kinesin Microtubule/Tubulin Mps1 Myosin PAK
Epigenetics >
AMPK Aurora Kinase DNA Methyltransferase Epigenetic Reader Domain HDAC Histone Acetyltransferase Histone Demethylase Histone Methyltransferase JAK MicroRNA PARP PKC Sirtuin Protein Arginine Deiminase
GPCR/G Protein >
5-HT Receptor Adenosine Receptor Adenylate Cyclase Adiponectin Receptor Adrenergic Receptor Angiotensin Receptor Bombesin Receptor Bradykinin Receptor Cannabinoid Receptor CaSR CCR CGRP Receptor Cholecystokinin Receptor CRFR CXCR Dopamine Receptor EBI2/GPR183 Endothelin Receptor GHSR Glucagon Receptor Glucocorticoid Receptor GNRH Receptor GPCR19 GPR109A GPR119 GPR120 GPR139 GPR40 GPR55 GPR84 Guanylate Cyclase Histamine Receptor Imidazoline Receptor Leukotriene Receptor LPL Receptor mAChR MCHR1 (GPR24) Melatonin Receptor mGluR Motilin Receptor Neurokinin Receptor Neuropeptide Y Receptor Neurotensin Receptor Opioid Receptor Orexin Receptor (OX Receptor) Oxytocin Receptor P2Y Receptor Prostaglandin Receptor Protease-Activated Receptor (PAR) Ras RGS Protein Sigma Receptor Somatostatin Receptor TSH Receptor Urotensin Receptor Vasopressin Receptor Melanocortin Receptor
Immunology/Inflammation >
Aryl Hydrocarbon Receptor CCR Complement System COX CXCR FLAP Histamine Receptor IFNAR Interleukin Related IRAK MyD88 NO Synthase NOD-like Receptor (NLR) PD-1/PD-L1 PGE synthase Salt-inducible Kinase (SIK) SPHK STING Thrombopoietin Receptor Toll-like Receptor (TLR) Arginase
JAK/STAT Signaling >
EGFR JAK Pim STAT
MAPK/ERK Pathway >
ERK JNK KLF MAP3K MAP4K MAPKAPK2 (MK2) MEK Mixed Lineage Kinase MNK p38 MAPK Raf Ribosomal S6 Kinase (RSK)
Membrane Transporter/Ion Channel >
ATP Synthase BCRP Calcium Channel CFTR Chloride Channel CRAC Channel CRM1 EAAT2 GABA Receptor GlyT HCN Channel iGluR Monoamine Transporter Monocarboxylate Transporter Na+/Ca2+ Exchanger Na+/HCO3- Cotransporter Na+/K+ ATPase nAChR NKCC P-glycoprotein P2X Receptor Potassium Channel Proton Pump SGLT Sodium Channel TRP Channel URAT1
Metabolic Enzyme/Protease >
15-PGDH 5 alpha Reductase 5-Lipoxygenase Acetyl-CoA Carboxylase Acyltransferase Adenosine Deaminase Adenosine Kinase Aldehyde Dehydrogenase (ALDH) Aldose Reductase Aminopeptidase Angiotensin-converting Enzyme (ACE) ATGL ATP Citrate Lyase Carbonic Anhydrase Carboxypeptidase Cathepsin CETP COMT Cytochrome P450 Dipeptidyl Peptidase Dopamine β-hydroxylase E1/E2/E3 Enzyme Elastase Enolase FAAH FABP Factor Xa Farnesyl Transferase Fatty Acid Synthase (FAS) FXR Glucokinase GSNOR Gutathione S-transferase HCV Protease Hexokinase HIF/HIF Prolyl-Hydroxylase HIV Integrase HIV Protease HMG-CoA Reductase (HMGCR) HSP Indoleamine 2,3-Dioxygenase (IDO) Isocitrate Dehydrogenase (IDH) Lactate Dehydrogenase LXR MAGL Mineralocorticoid Receptor Mitochondrial Metabolism MMP Nampt NEDD8-activating Enzyme Neprilysin PAI-1 PDHK PGC-1α Phosphatase Phosphodiesterase (PDE) Phospholipase Procollagen C Proteinase Proteasome Pyruvate Kinase RAR/RXR Renin ROR Ser/Thr Protease SGK Stearoyl-CoA Desaturase (SCD) Thrombin Tryptophan Hydroxylase Tyrosinase Xanthine Oxidase
Neuronal Signaling >
5-HT Receptor AChE Adenosine Kinase Amyloid-β Beta-secretase CaMK CGRP Receptor COMT Dopamine Receptor Dopamine Transporter FAAH GABA Receptor GlyT iGluR Imidazoline Receptor mAChR Melatonin Receptor Monoamine Oxidase nAChR Neurokinin Receptor Opioid Receptor Serotonin Transporter γ-secretase
NF-κB >
NF-κB IKK Keap1-Nrf2 MALT1
PI3K/Akt/mTOR >
Akt AMPK ATM/ATR DNA-PK GSK-3 MELK mTOR PDK-1 PI3K PI4K PIKfyve PTEN
PROTAC >
PROTAC E3 Ligase Ligand-Linker Conjugate Ligand for E3 Ligase PROTAC Linker PROTAC-linker Conjugate for PAC
Protein Tyrosine Kinase/RTK >
Ack1 ALK Bcr-Abl BMX Kinase Btk c-Fms c-Kit c-Met/HGFR Discoidin Domain Receptor DYRK EGFR Ephrin Receptor FAK FGFR FLT3 IGF-1R Insulin Receptor IRAK Itk PDGFR PKA Pyk2 ROS Src Syk TAM Receptor Trk Receptor VEGFR
Stem Cell/Wnt >
Casein Kinase ERK Gli GSK-3 Hedgehog Hippo (MST) JAK Notch Oct3/4 PKA Porcupine ROCK sFRP-1 Smo STAT TGF-beta/Smad Wnt YAP β-catenin γ-secretase
TGF-beta/Smad >
TGF-beta/Smad PKC ROCK TGF-β Receptor
Vitamin D Related >
VD/VDR
Others >
Androgen Receptor Aromatase Estrogen Receptor/ERR Progesterone Receptor Thyroid Hormone Receptor Others

Proanthocyanidins

Proanthocyanidins are a class of polyphenols with antibacterial, antifungal and antiviral activities, which can be used in the treatment of chronic venous insufficiency, capillary fragility, sunburn and retinopathy.

  • CAS Number: 20347-71-1
  • MF: C30H26O13
  • MW: 594.520
  • Catalog: Bacterial
  • Density: 1.9±0.1 g/cm3
  • Boiling Point: 986.4±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 550.3±34.3 °C

Baicalin

Baicalin is a flavonoid glycoside isolated from Scutellaria baicalensis. Baicalin reduces the expression of NF-κB.

  • CAS Number: 21967-41-9
  • MF: C21H18O11
  • MW: 446.361
  • Catalog: Autophagy
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 836.6±65.0 °C at 760 mmHg
  • Melting Point: 202-205 ºC
  • Flash Point: 297.2±27.8 °C

Eriodictyol

Eriodictyol is a flavonoid isolated from the Chinese herb, with antioxidant and anti-inflammatory activity. Eriodictyol induces Nrf2 signaling pathway.

  • CAS Number: 552-58-9
  • MF: C15H12O6
  • MW: 288.252
  • Catalog: Keap1-Nrf2
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 625.2±55.0 °C at 760 mmHg
  • Melting Point: 270ºC
  • Flash Point: 241.9±25.0 °C

Luteolin-3-O-beta-D-glucuronide

Luteolin-3-O-beta-D-glucuronide is a luteolin glucosiduronic acid consisting of luteolin having a beta-D-glucosiduronic acid residue attached at the 3'-position.

  • CAS Number: 53527-42-7
  • MF: C21H18O12
  • MW: 462.360
  • Catalog: Others
  • Density: 1.8±0.1 g/cm3
  • Boiling Point: 865.4±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 305.9±27.8 °C

Luteolin-6-C-glucoside

Isoorientin is a potent inhibitor of COX-2 with an IC50 value of 39 μM.

  • CAS Number: 4261-42-1
  • MF: C21H20O11
  • MW: 448.377
  • Catalog: Cancer
  • Density: 1.8±0.1 g/cm3
  • Boiling Point: 856.7±65.0 °C at 760 mmHg
  • Melting Point: 245-246ºC
  • Flash Point: 303.2±27.8 °C

Sophoricoside

Sophoricoside is an isoflavone glycoside isolated from Sophora japonica and has anti-inflammatory, anti-cancer and immunosuppressive effects.

  • CAS Number: 152-95-4
  • MF: C21H20O10
  • MW: 432.378
  • Catalog: Cancer
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 763.3±60.0 °C at 760 mmHg
  • Melting Point: 285ºC
  • Flash Point: 271.5±26.4 °C

Scutellarein

Scutellarin, a main active ingredient extracted from Erigeron breviscapus (Vant.) Hand-Mazz., has been wildly used to treat acute cerebral infarction and paralysis induced by cerebrovascular diseases.

  • CAS Number: 529-53-3
  • MF: C15H10O6
  • MW: 286.236
  • Catalog: Autophagy
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 642.9±55.0 °C at 760 mmHg
  • Melting Point: 330ºC
  • Flash Point: 249.9±25.0 °C

Complanatoside

Complanatuside is a flavonoid found in the traditional Chinese medicine Semen Astragali Complanati.

  • CAS Number: 116183-66-5
  • MF: C28H32O16
  • MW: 624.544
  • Catalog: Cancer
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 975.0±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 320.2±27.8 °C

Chrysin

Chrysin is one of the most well known estrogen blockers.

  • CAS Number: 480-40-0
  • MF: C15H10O4
  • MW: 254.238
  • Catalog: Cancer
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 491.9±45.0 °C at 760 mmHg
  • Melting Point: 284-286 °C(lit.)
  • Flash Point: 192.5±22.2 °C

(-)-Epigallocatechin gallate

(-)-Epigallocatechin Gallate is an antioxidant polyphenol flavonoid form green tea, and inhibits the activation of EGFR, HER2 and HER3, with antitumor activity.

  • CAS Number: 989-51-5
  • MF: C22H18O11
  • MW: 458.372
  • Catalog: Apoptosis
  • Density: 1.9±0.1 g/cm3
  • Boiling Point: 909.1±65.0 °C at 760 mmHg
  • Melting Point: 222-224°C
  • Flash Point: 320.0±27.8 °C

ProcyanidinB2

Procyanidin B2 is a natural flavonoid, with anti-cancer, antioxidant activities.

  • CAS Number: 29106-49-8
  • MF: C30H26O12
  • MW: 578.520
  • Catalog: Cancer
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 955.3±65.0 °C at 760 mmHg
  • Melting Point: 197-198ºC
  • Flash Point: 531.6±34.3 °C

Naringenin

Naringenin is the predominant flavanone in grapefruit; displays strong anti-inflammatory and antioxidant activities.

  • CAS Number: 480-41-1
  • MF: C15H12O5
  • MW: 272.253
  • Catalog: Influenza Virus
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 577.5±50.0 °C at 760 mmHg
  • Melting Point: 247-250 °C(lit.)
  • Flash Point: 224.7±23.6 °C

Nobiletin

Nobiletin is a citrus flavonoid with anti-inflammatory, anti-cancer, cholesterol lowering, memory protection activities.

  • CAS Number: 478-01-3
  • MF: C21H22O8
  • MW: 402.395
  • Catalog: Autophagy
  • Density: 1.2±0.1 g/cm3
  • Boiling Point: 587.9±50.0 °C at 760 mmHg
  • Melting Point: 138 °C
  • Flash Point: 256.5±30.2 °C

Isosakuranetin

Isosakuranetin is a flavanone flavonoid which can be found in the fruit of Citrus bergamia.

  • CAS Number: 480-43-3
  • MF: C16H14O5
  • MW: 286.279
  • Catalog: Others
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 539.2±50.0 °C at 760 mmHg
  • Melting Point: 193-194ºC
  • Flash Point: 205.6±23.6 °C

Wogonin

Wogonin is a naturally occurring mono-flavonoid, can inhibit the activity of CDK8 and Wnt, and exhibits anti-inflammatory and anti-tumor effects.

  • CAS Number: 632-85-9
  • MF: C16H12O5
  • MW: 284.263
  • Catalog: Autophagy
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 518.8±50.0 °C at 760 mmHg
  • Melting Point: 203-206°C
  • Flash Point: 198.4±23.6 °C

Ononin

Ononin is an isoflavonoid, is an additional growth inhibitor in soils associated with the weed, Pluchea lanceolata.

  • CAS Number: 486-62-4
  • MF: C22H22O9
  • MW: 430.405
  • Catalog: Others
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 697.8±55.0 °C at 760 mmHg
  • Melting Point: 216ºC
  • Flash Point: 245.7±25.0 °C

Acacetin

1) Natural acacetin was a 4.0-fold and 5.5-fold more potent inhibitor of BACE-1 than oleanolic acid and maslinic acid, respectively.[1]2) Acacetin significantly suppressed the photoreceptor collapse. [1]3) Acacetin significantly reduces the Aβ levels by interfering with human APP proteolytic processing and BACE-1 expression. [1]4) Acacetin inhibited the generation of the APP-CTF by affecting APP cleavage. [1]5) Acacetin prolongs lifespan of significantly in the dose dependent manner. Acacetin(25 uM) had the greatest effect on longevity, extending mean lifespan significantly by 27.31% at 25 uM concentration

  • CAS Number: 480-44-4
  • MF: C16H12O5
  • MW: 284.263
  • Catalog: Potassium Channel
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 518.6±50.0 °C at 760 mmHg
  • Melting Point: 260-265 °C(lit.)
  • Flash Point: 198.3±23.6 °C

2''-O-Rhamnosylicariside II

2''-O-Rhamnosylicariside II is a flavonoid glycoside compound and might be beneficial for improving postmenopausal osteoporosis.

  • CAS Number: 135293-13-9
  • MF: C33H40O14
  • MW: 660.662
  • Catalog: Others
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 892.8±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 283.2±27.8 °C

Ortho-Hydroxyacetophenone

2'-Hydroxyacetophenone is found in alcoholic beverages. 2'-Hydroxyacetophenone is present in tomato, cassia, fried beef, rum, whiskey, cocoa, coffee and black tea. 2'-Hydroxyacetophenone is a flavouring ingredient. Building block in chemical synthesis.

  • CAS Number: 118-93-4
  • MF: C8H8O2
  • MW: 136.148
  • Catalog: Others
  • Density: 1.1±0.1 g/cm3
  • Boiling Point: 218.4±13.0 °C at 760 mmHg
  • Melting Point: 41735ºC
  • Flash Point: 87.5±12.4 °C

Malonylgenistin

6''-O-Malonylgenistin(Malonylgenistin) is an isoflavone derivative.

  • CAS Number: 51011-05-3
  • MF: C24H22O13
  • MW: 518.424
  • Catalog: Others
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 880.2±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 302.0±27.8 °C

Daidzein dimethyl ether

4',7-Dimethoxyisoflavone is isolated from the leaves of Albizzia lebbeck, which shows antifungal activity.

  • CAS Number: 1157-39-7
  • MF: C17H14O4
  • MW: 282.29100
  • Catalog: Fungal
  • Density: 1.242g/cm3
  • Boiling Point: 452.8ºC at 760mmHg
  • Melting Point: 161-163°C
  • Flash Point: 202.2ºC

Isosilybin

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

  • CAS Number: 72581-71-6
  • MF: C25H22O10
  • MW: 482.436
  • Catalog: Cytochrome P450
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 793.0±60.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 274.5±26.4 °C

Daidzein

Daidzein is a soy isoflavone, which acts as a PPAR activator.

  • CAS Number: 486-66-8
  • MF: C15H10O4
  • MW: 254.238
  • Catalog: PPAR
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 512.8±50.0 °C at 760 mmHg
  • Melting Point: 315-323°C (dec.)
  • Flash Point: 201.2±23.6 °C

Catechin

Catechin inhibits cyclooxygenase-1 (COX-1) with an IC50 of 1.4 μM.

  • CAS Number: 154-23-4
  • MF: C15H14O6
  • MW: 290.268
  • Catalog: Cancer
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 630.4±55.0 °C at 760 mmHg
  • Melting Point: 175-177ºC (anhydrous)(lit.)
  • Flash Point: 335.0±31.5 °C

Licochalcone A

Licochalcone A, a flavonoid isolated from the famous Chinese medicinal herb Glycyrrhiza uralensis Fisch, presents obvious anti-cancer effects. The IC50 value is 0.97 μM for UGT1A1.

  • CAS Number: 58749-22-7
  • MF: C21H22O4
  • MW: 338.397
  • Catalog: Autophagy
  • Density: 1.2±0.1 g/cm3
  • Boiling Point: 532.6±50.0 °C at 760 mmHg
  • Melting Point: 100°
  • Flash Point: 186.9±23.6 °C

Engeletin

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

  • CAS Number: 572-31-6
  • MF: C21H22O10
  • MW: 434.39
  • Catalog: NF-κB
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 820.0±65.0 °C at 760 mmHg
  • Melting Point: 176-177ºC
  • Flash Point: 289.5±27.8 °C

Troxerutin

Troxerutin, also known as vitamin P4, is a tri-hydroxyethylated derivative of natural bioflavonoid rutins which can inhibit the production of reactive oxygen species (ROS) and depress ER stress-mediated NOD activation.

  • CAS Number: 7085-55-4
  • MF: C33H42O19
  • MW: 742.675
  • Catalog: NOD-like Receptor (NLR)
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 1058.4±65.0 °C at 760 mmHg
  • Melting Point: 168 - 176ºC
  • Flash Point: 332.0±27.8 °C

amentoflavone

Amentoflavone is a natural biflavone compound with many biological properties, including anti-inflammatory, antioxidative, and neuroprotective effects.IC50 value:Target:In vitro: In irradiated v79 cells, Pretreatment with amentoflavone 24 hours prior to 8 Gy 60Co γ-ray irradiation significantly inhibited apoptosis, promoted the G2 phase, decreased the concentration of ROS and mitochondrial mass [2]. Amentoflavone dose-dependently inhibited the viability of SW480 cells, and a high concentration of amentoflavone (150 μmol/L) obviously induced apoptosis of the cells [3]. In vivo: In epilepsy models, amentoflavone effectively prevented pilocarpine-induced epilepsy in a mouse kindling model, suppressed nuclear factor-κB activation and expression, inhibited excessive discharge of hippocampal neurons resulting in a reduction in epileptic seizures, shortened attack time, and diminished loss and apoptosis of hippocampal neurons [1].

  • CAS Number: 1617-53-4
  • MF: C30H18O10
  • MW: 538.458
  • Catalog: Others
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 910.5±65.0 °C at 760 mmHg
  • Melting Point: >300ºC
  • Flash Point: 308.5±27.8 °C

Epimedin B

Epimedin B, a component extracted from Epimedii Folium, is reported to have antiosteoporotic activity.IC50 value:Target:In vitro:In vivo: Prednisolone-induced osteoporosis model using zebrafish was used to evaluate the antiosteoporotic activity of micro amount epimedin B. The result showed that 1 μmol·L- 1epimedin B groups were significantly increased when compared with model group; Epimedin B can prevent zebrafish osteoporosis induced by prednisolone [1].

  • CAS Number: 110623-73-9
  • MF: C38H48O19
  • MW: 808.776
  • Catalog: Others
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 1066.1±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 325.6±27.8 °C

osajin

Osajin is the major bioactive isoflavone present in the fruit of Maclura pomifera with antitumor, antioxidant and anti-inflammatory activities.

  • CAS Number: 482-53-1
  • MF: C25H24O5
  • MW: 404.455
  • Catalog: Apoptosis
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 632.3±55.0 °C at 760 mmHg
  • Melting Point: 189° (uncorr), 193° (corr)
  • Flash Point: 218.7±25.0 °C