Five Withanolides from the Leaves of Datura metel L. and Their Inhibitory Effects on Nitric Oxide Production
oleh: Bing-You Yang, Rui Guo, Ting Li, Yan Liu, Chang-Fu Wang, Zun-Peng Shu, Zhi-Bin Wang, Jing Zhang, Yong-Gang Xia, Hai Jiang, Qiu-Hong Wang, Hai-Xue Kuang
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2014-04-01 |
Deskripsi
Four new withanolides named dmetelins A–D (compounds 1–4), along with the known compound 7α,27-dihydroxy-1-oxo-witha-2,5,24-trienolide (5) were isolated from the leaves of Datura metel L. (Solanaceae). Their structures were elucidated on the basis of detailed analysis of 1D and 2D NMR and mass spectrometry data. All the compounds were evaluated for their inhibitory effects on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW264.7 cells. Compounds 1, 4 and 5 showed significant inhibitory activities, and compounds 2 and 3 showed moderate inhibitory activities with IC50 values of 17.8, 11.6, 14.9, 33.3 and 28.6 μM, respectively.