Valoneic acid dilactone

Valoneic acid dilactone

Names
Other names Valoneic acid bislactone Valoneic acid bilactone
Identifiers
CAS Number	60202-70-2 Y
3D model (JSmol)	Interactive image
ChemSpider	8327382 N
PubChem CID	10151874
InChI InChI=1S/C21H10O13/c22-7-2-6(19(28)29)16(15(27)12(7)24)32-9-3-5-11-10-4(20(30)34-18(11)14(9)26)1-8(23)13(25)17(10)33-21(5)31/h1-3,22-27H,(H,28,29) N Key: BPAOAXAAABIQKR-UHFFFAOYSA-N N InChI=1/C21H10O13/c22-7-2-6(19(28)29)16(15(27)12(7)24)32-9-3-5-11-10-4(20(30)34-18(11)14(9)26)1-8(23)13(25)17(10)33-21(5)31/h1-3,22-27H,(H,28,29) Key: BPAOAXAAABIQKR-UHFFFAOYAM
SMILES Oc1cc5c(=O)oc3c(O)c(Oc4c(C(=O)O)cc(O)c(O)c4O)cc2c3c5c(c1O)oc2=O
Properties
Chemical formula	C21H10O13
Molar mass	470.28 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Valoneic acid dilactone is a hydrolysable tannin that can be isolated from the heartwood of Shorea laeviforia and in oaks species like the North American white oak (Quercus alba) and European red oak (Quercus robur).

It shows an inhibitory effect on 5α-reductase, an enzyme involved in steroids metabolism and prostate cancer.