A New Bis-Labdanic Diterpene from the Rhizomes of Alpinia pahangensis

Abstract

The rhizomes of Alpinia pahangensis yielded a new bis-labdanic diterpene for which the name pahangensin C (1) was proposed along with twelve known analogues (2–13). The structure of 1 was elucidated via spectroscopic methods including 1D and 2D NMR techniques and LCMS-IT-TOF analysis. Compounds 2 and 12 were isolated for the first time from the genus Alpinia. This is the second occurrence of compounds 2 and 12 in the Zingiberaceae family. Selected analogues exhibited moderate to strong inhibitory activity against Staphylococcus aureus and Bacillus cereus.

Key words

Alpinia pahangensis - Zingiberaceae - bis-labdanic diterpene - labdane diterpene - pahangensin C

• References

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