Roburin As

Roburin A is a tannin found in oak wood, most commonly from Quercus robur and Quercus petraea (English oak and sessile oak) or Quercus alba (American white oak) , as well as oak cork (Quercus suber) . It is one of the primary compounds that contribute to the taste, aroma, and color of aged wines and spirits that have been matured in oak barrels .

While humans have been consuming Roburin A for centuries through this practice, very little is currently known about its effects on human health.

Here's a more scientific description of Roburin A:

• A dimeric compound, composed of two vescalagin subunits linked through an ether bond.
• Chemical formula: C82H50O50
• Molar mass: 1,835.24 g/mol [Wiki Roburin A]