Botanical Source: Engelhardtia roxburghiana Wall. CAS No.: 29838-67-3 Part Used: Bark or Leaf Specification: Astilbin 15%, 98% by HPLC Molecular Formula: C21H22O11 Molecular Weight: 450.4 Description: Astilbin is a flavanonol, a type of flavonoid; neoisoastilbin is the (2S-cis)-isomer and isoastilbin is the (2R-cis)-isomer. Astilbin can be found in St John's wort, in Dimorphandra mollis, in the leaves of Harungana madagascariensis (Hypericaceae), in the rhizome of Astilbe thunbergii, in the root of Astilbe odontophylla(Saxifragaceae), in the rhizone of Smilax glabra(Chinaroot, Smilacaceae) and in the bark of Hymenaea martiana. It can be isolated from Kohki tea processed from Engelhardtia chrysolepis (huang-qui). Functions: Skin Care: Help for Sensitive Skin and Skin Allergies Anti-inflammation and anti-aging; Obesity patients: There are anti-oxidation, the role of inhibiting obesity; High blood sugar from: lowering blood glucose and enhance immune function; Uses Astilbin can act as an insecticide against Anticarsia gemmatalis and Spodoptera frugiperda. It shows in vitro antibacterial activity and activity on burn wound healing. Astilbin is used in traditional Chinese medicine.