Wikipedia
Epsilon-Viniferin
ε-Viniferin is a naturally occurring phenol, belonging to the stilbenoids family. It is a resveratrol dimer.
It is found in Vitis vinifera grapevines, in wines, in the Oriental medicinal plant Vitis coignetiae and in the stem bark of Dryobalanops aromatica.
Cis-epsilon-viniferin can be found in Paeonia lactiflora.
It shows a human cytochrome P450 enzymes inhibition activity.