The Collaborative International Dictionary
imperatorin
Peucedanin \Peu*ced"a*nin\, n. (Chem.) A tasteless white crystalline substance, extracted from the roots of the sulphurwort ( Peucedanum), masterwort ( Imperatoria), and other related plants; -- called also imperatorin.
Wikipedia
Imperatorin
Imperatorin is a furocoumarin and a phytochemical that has been isolated from Urena lobata L. ( Malvaceae), Angelica archangelica, Angelica dahurica, Glehnia littoralis, Saposhnikovia divaricata, Cnidium monnieri, Incarvillea younghusbandii, and Zanthoxylum americanum mill. It is biosynthesized from umbelliferone, a coumarin derivative.