quercetin
CHEBI:16243
·resolve ·ANTIBACTERIAL
·EXACT
SEEDED
A pentahydroxyflavone having the five hydroxy groups placed at the 3-, 3'-, 4'-, 5- and 7-positions. It is one of the most abundant flavonoids in edible vegetables, fruit and wine. — ChEBI
Machine-generated and unreviewed. Identity, structure and
cross-references come straight from ChEBI's and CARD's own data; no curator has
signed off on this record yet.
Classification
Strictly broader compounds or drug classes this molecule belongs to.
Chemical structure
Computed structure properties
| Molecular formula | C15H10O7 |
|---|
| Charge | 0 |
|---|
| Average mass | 302.238 Da |
|---|
| Monoisotopic mass | 302.04265 Da |
|---|
| Source | ChEBI |
|---|
| InChIKey | REFJWTPEDVJJIY-UHFFFAOYSA-N |
|---|
SMILES
O=c1c(O)c(-c2ccc(O)c(O)c2)oc2cc(O)cc(O)c12
InChI
InChI=1S/C15H10O7/c16-7-4-10(19)12-11(5-7)22-15(14(21)13(12)20)6-1-2-8(17)9(18)3-6/h1-5,16-19,21H
Also called
- 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one (EXACT_SYNONYM)— chebi
- 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one (EXACT_SYNONYM)— chebi
- 3,3',4',5,7-pentahydroxyflavone (EXACT_SYNONYM)— chebi
- 3,5,7,3',4'-PENTAHYDROXYFLAVONE (EXACT_SYNONYM)— chebi
- 3,5,7,3',4'-Pentahydroxyflavone (EXACT_SYNONYM)— chebi
- Quercetin (EXACT_SYNONYM)— chebi
- sophoretin (EXACT_SYNONYM)— chebi
- xanthaurine (EXACT_SYNONYM)— chebi
Cross-references
Equivalent identifiers for this same structure in other resources.
- cas:117-39-5
- drugbank:DB04216
- drugcentral:3514
- foodb.food:FDB011904
- gmelin:579210
- hmdb:HMDB0005794
- kegg.compound:C00389
- knapsack:C00004631
- lincs.smallmolecule:LSM-4199
- lipidmaps:LMPK12110004
- metacyc.compound:CPD-520
- patent:KR20120121684
- patent:US2013012577
- pdb-ccd:QUE
- reaxys:317313
- wikipedia.en:Quercetin
Activity roles
Every antimicrobial role a source asserts for this compound — the
unreduced evidence behind its antimicrobial_class.
Source concepts
Every upstream concept that resolved to this record. The merge is
the product: this is what shows ChEBI and CARD are describing the same structure.
Upstream concepts merged into this record
| Source | Native ID | Label | Minted CURIE | Version |
|---|
| CHEBI |
CHEBI:16243 |
quercetin |
antibioticmech:chebi-6e694d78e2 |
2026-08-30 |
Molecular targets
The molecular entity or process this compound acts on. Each target
carries evidence — this is a mechanistic claim, not a classification.
Replicase polyprotein 1ab VIRAL_PROTEIN MEASURED_TARGET_ASSOCIATION
BindingDB quantitative measurement in the named target organism; source assay descriptions and identifiers are retained per measurement. Evidence status: PRIMARY_EVIDENCE. Source: BINDINGDB 2026-09 (retrieved 2026-08-31).
Severe acute respiratory syndrome coronavirus 2 NCBITaxon:2697049
Quantitative measurements
| Type | Reported value | Assay | BindingDB IDs | Reference |
|---|
| KI |
7400 nM |
Various Assay
This is a review article. Please point to the original journal. |
RSID 1074012
assay 10079_1
monomer 7460 |
PMID:34798775 |
Organism-specific examples
| Protein | Gene | Organism | Entry |
|---|
Replicase polyprotein 1ab UniProtKB:P0DTD1 |
— |
Severe acute respiratory syndrome coronavirus 2 |
REVIEWED |
- PMID:34798775 (BindingDB literature-curated quantitative target measurement; source value, assay text, reaction-set ID, and target organism retained.)
Replicase polyprotein 1ab VIRAL_PROTEIN MEASURED_TARGET_ASSOCIATION
BindingDB quantitative measurement in the named target organism; source assay descriptions and identifiers are retained per measurement. Evidence status: PRIMARY_EVIDENCE. Source: BINDINGDB 2026-09 (retrieved 2026-08-31).
Severe acute respiratory syndrome coronavirus NCBITaxon:2901879
Quantitative measurements
| Type | Reported value | Assay | BindingDB IDs | Reference |
|---|
| EC50 |
83400 nM |
No assay is provided
This is a review article. |
RSID 868608
assay 8917_1
monomer 7460 |
PMID:26878082 |
| IC50 |
23800 nM |
Various Assay
This is a review article. Please point to the original journal. |
RSID 1074198
assay 10079_1
monomer 7460 |
PMID:34798775 |
Organism-specific examples
| Protein | Gene | Organism | Entry |
|---|
Replicase polyprotein 1ab UniProtKB:P0C6X7 |
— |
Severe acute respiratory syndrome coronavirus |
REVIEWED |
- PMID:26878082 (BindingDB literature-curated quantitative target measurement; source value, assay text, reaction-set ID, and target organism retained.)
- PMID:34798775 (BindingDB literature-curated quantitative target measurement; source value, assay text, reaction-set ID, and target organism retained.)
Spike glycoprotein VIRAL_PROTEIN MEASURED_TARGET_ASSOCIATION
BindingDB quantitative measurement in the named target organism; source assay descriptions and identifiers are retained per measurement. Evidence status: PRIMARY_EVIDENCE. Source: BINDINGDB 2026-09 (retrieved 2026-08-31).
Severe acute respiratory syndrome coronavirus NCBITaxon:2901879
Quantitative measurements
| Type | Reported value | Assay | BindingDB IDs | Reference |
|---|
| EC50 |
83400 nM |
No assay is provided
This is a review article. |
RSID 868728
assay 8918_1
monomer 7460 |
PMID:32852058 |
Organism-specific examples
| Protein | Gene | Organism | Entry |
|---|
Spike glycoprotein UniProtKB:P59594 |
— |
Severe acute respiratory syndrome coronavirus |
REVIEWED |
- PMID:32852058 (BindingDB literature-curated quantitative target measurement; source value, assay text, reaction-set ID, and target organism retained.)
Curation history
-
SEEDED_FROM_SOURCES
2026-08-30 · seed_from_sources
Seeded from data/raw/ inventories (CHEBI)
-
RESEEDED_FROM_SOURCES
2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
-
RESEEDED_FROM_SOURCES
2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
-
RESEEDED_FROM_SOURCES
2026-08-31 · seed_from_sources
Re-seeded from updated data/raw/ inventories
Provenance
Seeded by scripts/seed_from_sources.py from the committed
inventories in data/raw/.
View the record.