Evening Chico,
Funny that you should ask but I just read this Deer Tongue
As far as the tobacco component, it's an herb, from the lily family I believe. It's been used for medicinal purposes by Colonists and Native Americans. Some people think that it has a vanilla taste but it tastes like an herb to me and it ghosts. It's not coumarin but there is a little chemical similarity. I never liked blending with it so I don't.
Pete