A new isopimarane-type diterpene with anti-inflammatory activity from the Clinacanthus nutans
Hai-Xia Liao1, Can-Can Shi1, Rui-Juan Wang1
1Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, Yulin, P. R. China.
Abstract:
A new isopimarane-type diterpene clinacanoid A (1) together with seven known terpenoids (2-8) were obtained from the Clinacanthus nutans. Their structures were elucidated based on extensive spectroscopic analysis (NMR, HR-ESI-MS), and the absolute configuration of 1 was established based on single crystal X-ray diffraction. The inhibitory activity of all the compounds on NO production in lipopolysaccharide-induced (LPS) mouse leukemic monocyte macrophage RAW264.7 cells was evaluated. Among them, compounds 1 and 3 showed potential anti-inflammatory activities, with IC50 values of 13.3 ± 0.3 and 12.4 ± 0.4 μM, respectively.
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