Abstract
Sixteen sesquiterpenoids (1 – 16), including two new compounds namely saussucostusosides A and B (1 and 2), were isolated from the roots of Saussurea costus by various chromatographic separations. Their structures were elucidated by 1 D and 2 D NMR and HR-QTOF-MS experiments. Among isolated compounds, costunlide (6), 3β-[4-hydroxymethacryloyloxy]-8α-hydroxycostunolide (10) and 11β,13-dihydrozaluzanin C (16) exhibited potent inhibitory effects on LPS-induced NO production in RAW264.7 cells with IC50 values of 7.08 ± 0.34, 2.40 ± 0.06 and 5.55 ± 0.24 µM, respectively.
Graphical Abstract
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Acknowledgements
The authors are thankful to the Institute of Chemistry, VAST for measurement of the NMR spectra and Dr. Bui Huu Tai, Institute of Marine Biochemistry, VAST for measurement of the HR-QTOF mass spectra.
Disclosure statement
No potential conflict of interest was reported by the authors.