Crotonpenoids A (1) and B (2), two highly modified clerodane diterpenoids featuring a new 10-(butan-2-yl)-1,6,12-trimethyltricyclo[7.2.1.0^2,7]dodecane skeleton, were isolated from the leaves and twigs of Croton yanhuii. Their structures including the absolute configurations were determined by spectroscopic analysis, single-crystal X-ray diffraction, and biomimetic semisynthesis. Compounds 1 and 2 exhibited an agonistic effect on pregnane X receptor at 10 μM.

中文翻译：

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巴豆类固醇A和B，两种高度修饰的具有Croton yanhuii三环[7.2.1.02,7]十二烷核的环戊烷二萜类化合物：分离，结构阐明和仿生半合成。

从中分离出具有两个新的10-（butan-2-yl）-1,6,12-trimethyltricyclo [7.2.1.0 ^2,7 ]十二烷骨架的两个高度改性的clerodane二萜类化合物Crotonpenoids A（1）和B（2）。巴豆艳辉的叶子和树枝。通过光谱分析，单晶X射线衍射和仿生半合成确定了它们的结构，包括绝对构型。化合物1和2对10μM的孕烷X受体表现出激动作用。