Abstract
Four new germacrane-type sesquiterpenoids (1-4) and two new guaiane-type sesquiterpenoids (5-6) were isolated from the fruits of Xanthium italicum Moretti. The structures of the new compounds were elucidated on the basis of spectroscopic analysis and X-ray diffraction experiment. Compounds 1, 2 and 6 showed the anti-inflammatory effects against the activation of NF-κB induced by lipopolysaccharide (LPS) with IC50 values of 20.12, 22.89 and 68.66 µM, respectively.
Graphical Abstract
Acknowledgments
This work was sponsored by the National Natural Science Foundation of China (No. 81573321). We are grateful to the Department of Instrumental Analysis, Institute of Material Medica, Chinese Academy of Medical Sciences & Peking Union Medical College for measuring the IR, NMR, MS and HRESIMS.
Disclosure statement
No potential conflict of interest was reported by the authors.