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Fustin

Names
IUPAC name (2R,3R)-3,3′,4′,7-Tetrahydroxyflavan-4-one
Systematic IUPAC name (2R,3R)-2-(3,4-Dihydroxyphenyl)-3,7-dihydroxy-2,3-dihydro-4H-1-benzopyran-4-one
Other names 2,3-Dihydrofisetin 3,7,3',4'-Tetrahydroxyflavanone 2,3-Dihydrofisetin 3′,4′,7-Trihydroxyflavanol
Identifiers
CAS Number	20725-03-5
3D model (JSmol)	Interactive image
ChEBI	CHEBI:5202
ChEMBL	ChEMBL470267
ChemSpider	4476304
ECHA InfoCard	100.039.975
EC Number	243-989-6
KEGG	C01378
PubChem CID	5317435
UNII	4994C1X19A
CompTox Dashboard (EPA)	DTXSID401136309
InChI InChI=1S/C15H12O6/c16-8-2-3-9-12(6-8)21-15(14(20)13(9)19)7-1-4-10(17)11(18)5-7/h1-6,14-18,20H/t14-,15+/m0/s1Key: FNUPUYFWZXZMIE-LSDHHAIUSA-N
SMILES C1=CC(=C(C=C12(C(=O)C3=C(O2)C=C(C=C3)O)O)O)O
Properties
Chemical formula	C15H12O6
Molar mass	288.255 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Y verify (what is  ?) Infobox references

Fustin, sometimes called "dihydrofisetin", is a flavanonol, a type of flavonoid. It can be found in young fustic (Cotinus coggygria) and in the lacquer tree (Toxicodendron vernicifluum).

Fustin shows protective effects on 6-hydroxydopamine-induced neuronal cell death.

Unlike fisetin, fustin has no double bond in the C-ring. This makes fustin a flavan, with two stereocenters and four stereoisomers.

References

1. Valianou, Lemonia; Stathopoulou, Konstantina; Karapanagiotis, Ioannis; Magiatis, Prokopios; Pavlidou, Eleni; Skaltsounis, Alexios-Leandros; Chryssoulakis, Yannis (2009). "Phytochemical analysis of young fustic (Cotinus coggygria heartwood) and identification of isolated colourants in historical textiles". Analytical and Bioanalytical Chemistry. 394 (3): 871. doi:10.1007/s00216-009-2767-z. PMID 19352635. S2CID 22188491.
2. ^ Park, Byung Chul; Lee, Yong Soo; Park, Hee-Juhn; Kwak, Mi-Kyoung; Yoo, Bong Kyu; Kim, Joo Young; Kim, Jung-Ae (2007). "Protective effects of fustin, a flavonoid from Rhus verniciflua Stokes, on 6-hydroxydopamine-induced neuronal cell death". Experimental & Molecular Medicine. 39 (3): 316. doi:10.1038/emm.2007.35. PMID 17603285.

• Flavanonols
• Catechols