| Literature DB >> 26634796 |
Liang Xiong, Qin-Mei Zhou, Yike Zou1, Ming-Hua Chen2, Li Guo, Guan-Ying Hu, Zhao-Hua Liu3, Cheng Peng.
Abstract
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-γ-lactone unit. The structure and absolute configuration were determined by spectroscopic analyses, a modified Mosher's 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 μM.Entities:
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Year: 2015 PMID： 26634796 DOI： 10.1021/acs.orglett.5b03227
Source DB: PubMed Journal: Org Lett ISSN： 1523-7052 Impact factor: 6.005