Three new norsesquiterpenoids from the seeds of Alpinia galanga

Abstract

From the seeds of Alpinia galanga Willd., three new norsesquiterpenoid racemic mixtures, galanols A–C (1–3) were isolated, along with three known sesquiterpenoids (4–6). Their structures were elucidated by means of UV, IR, HR-ESI-MS, 1D NMR and 2D NMR spectroscopic data.

Keywords::

• Alpinia galanga
• Zingiberaceae
• norsesquiterpenoids
• galanols A–C

Acknowledgements

This work was supported by “Major Drug Discovery” Science and Technology Major Project (No. 2012ZS09301-002). The authors acknowledge the Department of Instrumental Analysis, Institute of Materia Medica, Chinese Academy of Medical Sciences, and Peking Union Medical College for all the spectral analyses. The authors also thank associate Professor Lin Ma for the plant identification.