Punicacortein B is an

ellagitannin The ellagitannins are a diverse class of hydrolyzable tannins, a type of polyphenol formed primarily from the oxidative linkage of galloyl groups in 1,2,3,4,6-pentagalloyl glucose. Ellagitannins differ from gallotannins, in that their galloyl group ...

, a polyphenol compound. It is found in the bark of ''

Punica granatum The pomegranate (''Punica granatum'') is a fruit-bearing deciduous shrub in the family Lythraceae, subfamily Punicoideae, that grows between tall. The pomegranate was originally described throughout the Mediterranean region. It was introduc ...

'' (pomegranate).Tannins and Related Compounds. XLI. : Isolation and Characterization of Novel Ellagitannins, Punicacorteins A, B, C, and D, and Punigluconin from the Bark of Punica granatum L. Tanaka Takashi, Nonaka Gen-Ichiro and Nishioka Itsuo, Chemical & Pharmaceutical Bulletin, 1986-02-25, 34(2), pages 656-663
abstract

References

Pomegranate ellagitannins Heterocyclic compounds with 4 rings {{aromatic-stub