Five Withanolides from the Leaves of Datura metel L. and Their Inhibitory Effects on Nitric Oxide Production
作者: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
DOI:10.3390/molecules19044548
日期:——
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.
从 Datura metel 叶子中分离出四种名为 dmetelins A–D 的新 withanolides(化合物 1–4),以及已知化合物 7α,27-diHydroxy-1-oxo-witha-2,5,24-trienolide (5) L.(茄科)。基于一维和二维核磁共振以及质谱数据的详细分析,阐明了它们的结构。评估了所有化合物对 RAW264.7 细胞中脂多糖 (LPS) 诱导的一氧化氮 (NO) 产生的抑制作用。化合物1、4和5表现出显着的抑制活性,化合物2和3表现出中等的抑制活性,IC50值分别为17.8、11.6、14.9、33.3和28.6 μM。