What is "scopoletin"

Scopoletin is a coumarin found in the root of plants in the genus Scopolia such as Scopolia carniolica and Scopolia japonica, in chicory, in Artemisia scoparia, in the roots and leaves of Stinging Nettle ( Urtica dioica ), in the passion flower, in Brunfelsia, in Viburnum prunifolium, in Solanum nigrum, in Mallotus resinosus, or and in Kleinhovia hospita. It can also be found in vinegar, some whiskies or in dandelion coffee. A similar coumarin is scoparone.