Sapelenins G–J, acyclic triterpenoids with strong anti-inflammatory activities from the bark of the Cameroonian medicinal plant Entandrophragma cylindricum
作者:Simeon Fogue Kouam、Souvik Kusari、Marc Lamshöft、Ostend Kamgue Tatuedom、Michael Spiteller
DOI:10.1016/j.phytochem.2012.06.004
日期:2012.11
derivatives named sapelenins G-J (1-4), along with eight known compounds, sapelenins A-D, ekeberin D2 (5), (+)-catechin and epicatechin, and anderolide G, were isolated from the stem bark of the Cameroonian medicinal plant, Entandrophragma cylindricum Sprague, on the basis of bioassay-guided fractionation. Their structures were determined by means of high-resolution mass spectrometry and NMR spectroscopic data
从喀麦隆药用植物的茎皮中分离出四种名为 sapelenins GJ (1-4) 的无环三萜衍生物,以及 8 种已知化合物 sapelenins AD、ekeberin D2 (5)、(+)-儿茶素和表儿茶素以及 anderolide G。植物,Entandophragma cylindricum Sprague,基于生物测定引导的分级分离。它们的结构是通过高分辨率质谱和核磁共振光谱数据以及与它们类似物的文献值进行比较来确定的。化合物 (1-4) 的绝对构型由改进的 Mosher 方法结合 NOESY 实验和化学修饰指定。通过评估它们抑制或抑制用植物血凝素 (PHA) 刺激的人外周血单核细胞 (PBMC) 分泌细胞因子白细胞介素 17 (IL-17) 的能力,评估了 sapelenins 的抗炎活性。进一步评估了这些化合物对 PMBC 的细胞毒性,以正确解释它们的抗炎反应。测试的化合物通过抑制