Eight New Eremophilane Derivatives from the Roots of Ligularia przewalskii

Abstract

Two known eremophilanodiolides [1,2] and four new compounds of this class [3-6], a new eremophilanolide [7], two eremophilane epimers [9,10], and a noreremophilane derivative [8], were isolated in a phytochemical investigation of the the roots of Ligularia przewalskii. Their structures were elucidated by nmr spectroscopic methods and by chemical transformations.