Astertarone A: A Triterpenoid Ketone Isolated from the Roots of Aster tataricus L.

摘要

The structure of astertarone A isolated from the root extract of Aster tataricus L. (Compositae) was established to be D:A-friedoeuph-21-en-3-one (1) based on spectroscopic methods. This is the first example of a naturally occurring triterpenoid with a D:A-friedoeuphane skeleton. Isolation and identification of epishionol (2), shionone (3), friedelin, epifriedelinol, and ψ-taraxasterol are also described.