Valoneic acid dilactone is a hydrolysable tannin that can be isolated from the heartwood of Shorea laevifolia[1] and in oaks species like the North American white oak (Quercus alba) and European red oak (Quercus robur).

[2] It shows an inhibitory effect on 5α-reductase,[1] an enzyme involved in steroids metabolism and prostate cancer.

This article about an aromatic compound is a stub.

You can help Wikipedia by expanding it.