Re-investigation of the anthraquinone pool of Rhamnus spp.: Madagascin from the fruits of Rhamnus cathartica and R. intermedia

摘要

As a continuation of our ongoing studies aimed at revealing the presence of oxyprenylated anthraquinones in plants belonging to the genus Rhamnus, in this paper we describe the extraction and HPLC separation of madagascin (3-isopentenyloxyemodin) from the fruits of R. cathartica L. and R. intermedia Steud. & Hochst. The title compound is described herein for the first time as a component of fruit extracts of Rhamnus species.