4.4 Article

Dimeric and monomeric dihydrostilbenes from the roots of Stemona mairei together with their hypoglycemic activities

Journal

TETRAHEDRON
Volume 79, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2020.131783

Keywords

Stemona mairei; Dihydrostilbenes; Structure elucidation; Quantum chemical calculation; Hypoglycemic activity assay

Funding

  1. NSFC-Yunnan Joint Fund [U1602264]
  2. National Natural Science Foundation of China [31872677]

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A phytochemical investigation of the roots of Stemona mairei revealed six new dihydrostilbene dimers and four monomers. The compounds were characterized using a combination of spectra and calculations, with Maistilbene G showing potential hypoglycemic activity. This study provides valuable insights into the chemical composition of this plant species.
A carefully performed phytochemical investigation of the roots of Stemona mairei (Stemonaceae) led to the discovery of six so far undescribed dihydrostilbene dimers maistilbene A-F and four monomers maistilbene G-J. This is the first report of stilbenoids of this plant species and the first report of dimeric dihydrostilbenes from this plant family. The absolute configuration of these compounds was determined by a combination of Mo-2(AcO)(4)-induced ECD spectra and quantum chemical calculation of NMR chemical shift, ECD and spin-spin coupling constants. Maistilbene G could increase the glucose consumption in L6 myotubes, disclosing a new hypoglycemic candidate. (C) 2020 Elsevier Ltd. All rights reserved.

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