A New Sesquiterpene from Ligularia fischeri

A new sesquiterpene, 7α-H-11-hydroxyeremophil-1(10)-en-2-one (1), together with 14 known sesquiterpenoids (2–15), were isolated from the extract of the whole plant of Ligularia fischeri. Among them, compounds 2–6 and 15 were isolated from Ligularia fischeri for the first time. The new compound was characterized by means of spectroscopic methods including 1D and 2D NMR and HR-ESI-MS, and the known ones were established by comparing their NMR data with those of the corresponding compounds in the literature.