Incarnolides A (1) and B (2), two schinortriterpenoids (SNTs) featuring a tricyclo[9.2.1.02,8]tetradecane-bridged system, together with two biosynthetically related known SNTs, lancifonins A (3) and C (4), were isolated from the stems of Schisandra incarnata. Their structures were elucidated by extensive spectroscopic analyses, and the absolute configurations were assigned by single-crystal X-ray diffraction and electronic circular dichroism calculation. The hypothetical biogenetic pathway of 1 and 2 was postulated. Compound 1 exhibited antiviral and neuroprotective activities.

中文翻译：

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Incarnolides A和B，两个五味子三萜与Schisandra incarnata的三环[9.2.1.02,8]十四烷桥连系统。

Incarnolides A（1）和B（2），两个以三环[9.2.1.02,8]十四烷桥连系统为特征的Schinortriterpenoids（SNT），以及两个生物合成相关的已知SNT，lancifonins A（3）和C（4），从北五味子的茎中分离出来。通过广泛的光谱分析阐明了它们的结构，并通过单晶X射线衍射和电子圆二色性计算确定了绝对构型。假设了1和2的假设生物发生途径。化合物1表现出抗病毒和神经保护活性。