(+)- and (-)-cochlearols A (1) and B (2), two meroterpenoids with novel polycyclic skeletons, were isolated from the fruiting bodies of the fungus Ganoderma cochlear. Their structures and stereochemistry were determined by using spectroscopic, computational and single-crystal X-ray diffraction methods. Cochlearol A is a new normeroterpenoid containing a naturally unusual dioxaspiro[4.5]decane motif. Biological studies showed that (-)-2 is a strong inhibitor of p-Smads, exhibiting renoprotective activities in TGF-beta 1 induced rat renal proximal tubular cells.
(+)和(-)-cochlearol A (1)和B (2)是从真菌Ganoderma cochlear的子实体中分离得到的两种具有新颖多环骨架的
倍半萜类化合物。它们的结构和立体
化学通过光谱分析、计算和单晶X射线衍射方法确定。Cochlearol A是一种新型的
倍半萜类化合物,含有一个在自然界中罕见的dioxaspiro[4.5]decane骨架。
生物研究表明,(-)-2是p-Smads的强
抑制剂,在TGF-beta 1诱导的肾小管上皮细胞模型中显示出保护肾脏的作用。