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CAS number 54141-72-9 N
PubChem 119258
ChemSpider 106533 YesY
ChEBI CHEBI:38200 YesY
Jmol-3D images Image 1
Molecular formula C21H22O11
Molar mass 450.39 g/mol
Appearance brown powder[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Astilbin is a flavanonol, a type of flavonoid. Astilbin is the (2R-trans)-isomer; neoisoastilbin is the (2S-cis)-isomer and isoastilbin is the (2R-cis)-isomer.[2]

Astilbin can be found in St John's wort (Hypericum perforatum, Clusiaceae, subfamily Hypericoideae, formerly often considered a full family Hypericaceae), in Dimorphandra mollis[3] (Fava d'anta, Fabaceae), in the leaves of Harungana madagascariensis (Hypericaceae),[4] in the rhizome of Astilbe thunbergii,[5] in the root of Astilbe odontophylla[6](Saxifragaceae), in the rhizone of Smilax glabra[7] (Chinaroot, Smilacaceae) and in the bark of Hymenaea martiana.[8] It can be isolated from Kohki tea processed from Engelhardtia chrysolepis (huang-qui).[2]


Astilbin can act as an insecticide against Anticarsia gemmatalis and Spodoptera frugiperda.[3] It shows in vitro antibacterial activity[4] and activity on burn wound healing.[5] Astilbin is used in traditional Chinese medicine.[6]

Related compounds[edit]

3'-O-Methylastilbin shows an immunosuppressive activity against contact dermatitis.[7]