In our continuing studies on saponins from Cameroonian medicinal plants, phytochemical investigation of Chytranthus klaineanus stem barks led to the isolation of three new oleanane-type saponins, named Klaineanosides A–C (1–3). Their structures were established by extensive analysis of their spectral data, mainly 1D (¹H, ¹³C NMR, and DEPT) and 2D (COSY, HSQC, NOESY, HSQC-TOCSY, and HMBC) NMR experiments, and mass spectrometry as 3-O-β-d-glucopyranosyl-(1→3)-β-d-xylopyranosyl-(1→4)[-β-d-xylopyranosyl(1→3)-β-d-xylopyranosyl(1→3)-α-l-rhamnopyranosyl-(1→2)]-α-l-arabinopyranosylhederagenin (1), 3-O-β-d-glucopyranosyl-(1→3)-β-d-xylopyranosyl-(1→4)[β-d-xylopyranosyl(1→3)-α-l-rhamnopyranosyl-(1→2)]-α-l-arabinopyranosylhederagenin (2), and 3-O-β-d-xylopyranosyl(1→4)-β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranosylhederagenin (3). These triterpene saponins 1–3 have hederagenin as aglycone with a -³Rha-²Ara-³hederagenin oligosaccharidic sequence usually found in Sapindaceae family.

在我们对来自喀麦隆药用植物的皂苷的持续研究中，对桔梗（Chytranthus klaineanus）茎皮的植物化学研究导致分离出三种新的齐墩果烷型皂苷（Klaineanosides A–C）（1-3）。通过对光谱数据进行广泛分析来建立其结构，主要是1D（¹ H，¹³ C NMR和DEPT）和2D（COSY，HSQC，NOESY，HSQC-TOCSY和HMBC）NMR实验，以及质谱法，例如3-D ø - β - d -glucopyranosyl-（1→3） - β - d -xylopyranosyl-（1→4）[ - β - d -xylopyranosyl（1→3） - β - d-xylopyranosyl（1→3） - α -升-rhamnopyranosyl-（1→2）] - α -升-arabinopyranosylhederagenin（1），3- ø - β - d -glucopyranosyl-（1→3） - β - d - xylopyranosyl-（1→4）[ β - d -xylopyranosyl（1→3） - α -升-rhamnopyranosyl-（1→2）] - α -升-arabinopyranosylhederagenin（2）和3- ö - β - d -木吡喃糖基（1→4）-β - d-葡萄糖吡喃糖基-（1→3）-α - 1-鼠李吡喃糖基-（1→2）-α - 1-阿拉伯吡喃喃糖基七叶皂苷元（3）。这些三萜皂甙1-3具有常春配基为具有糖苷配基- ³ Rha- ²的Ara- ³常春配基的寡糖通常在无患子科家族中发现的序列。