Bieremoligularolide and eremoligularin, two novel sesquiterpenoids from Ligularia muliensis

From the roots of Ligularia muliensis, a novel bieremophilanolide and a new eremophilanolide have been isolated and their structures were elucidated by spectroscopic techniques, including HRMS, IR, UV, 1D-NMR, 2D-NMR, and CD spectra.