Three new diterpenes, helioscopinolides A, B and C, have been isolated from the plant Euphorbiahelioscopia L., and their stereostructures also been elucidated on the basis of their spectral and chemical data coupled with an X-ray crystallographic analysis of helioscopinolide A.
三种新的二萜类天竺葵内酯 A、B 和 C,已从植物大戟属植物中分离出来,并且它们的立体结构也基于它们的光谱和化学数据以及天葵内酯 A 的 X 射线晶体学分析得到阐明。
Euphohelides A–C, <i>ent</i>-Abietane-Type Norditerpene Lactones from <i>Euphorbia helioscopia</i> and Their Anti-Inflammatory Activities
Three unreported ent-abietane-type norditerpene lactones, euphohelides A–C (1–3), and 11 known analogs (4–14) were isolated from the whole plants of Euphorbia helioscopia L. Euphohelide A (1) is an unprecedented 2-nor-ent-abietane lactone bearing a unique 5/6/6/5 tetracyclic system. Euphohelides B (2) and C (3) possess 2-nor-6/6/6/5 and 2,3-dinor-5/6/6/5 dilactone tetracyclic moieties, respectively
从大戟全株中分离出三种未报道的对映松香烷型去二萜内酯 Euphohelides A–C ( 1 – 3 ) 和 11 种已知类似物 ( 4 – 14 ) 。 Euphohelide A ( 1 ) 是一种前所未有的 2- Nor - ent-枞烷内酯具有独特的5/6/6/5四环系统。Euphhelides B ( 2 ) 和 C ( 3 ) 具有 2-也-6/6/6/5 和 2,3-二分别为-5/6/6/5双内酯四环部分。它们的结构是通过光谱方法、计算 ECD 和 X 射线晶体分析确定的。基于推测的生物遗传途径,从前体4实现了1的仿生合成。化合物1和5显着减轻了LPS诱导的NO释放,IC 50值为32.98±1.13和33.82±3.25μM,这可能与调节NF-κB信号通路有关。