Leonuketal, a Spiroketal Diterpenoid from Leonurus japonicus

Leonuketal, a Spiroketal Diterpenoid from Leonurus japonicus
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Leonuketal,一种来自益母草的螺酮二萜类化合物

DOI:
10.1021/acs.orglett.5b03227
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发表时间:
2015-12-18
期刊:
影响因子:
5.2
通讯作者:
Peng, Cheng
Peng, Cheng
中科院分区:
化学1区
文献类型:
--
作者:
Xiong, Liang;Zhou, Qin-Mei;Peng, Cheng

文献摘要

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从益母草(Leonurus)的地上部分分离得到一种结构复杂的螺酮缩二萜化合物leonuketal(1)。该化合物具有前所未有的四环骨架,其包含与缩酮-γ-内酯单元稠合的桥连螺缩酮部分。通过光谱分析、改进的Moshers方法和电子圆二色谱(ECD)计算确定了其结构和绝对构型。益母草酮(1)对KCl引起的大鼠主动脉收缩有明显的舒张作用,其EC_(50)值为2.32 μ M。
An architecturally complex spiroketal diterpenoid, leonuketal (1), was isolated from the aerial parts of the plant Leonurus japonicus. This compound possessed an unprecedented tetracyclic skeleton that comprised a bridged spiroketal moiety fused with a ketal-gamma-lactone unit. The structure and absolute configuration were determined by spectroscopic analyses, a modified Moshers method, and ECD (electronic circular dichroism) calculations. Leonuketal (1) showed significant vasorelaxant activity against KCl-induced contraction of rat aorta, with the EC50 value of 2.32 mu M.