One new and several minor diarylheptanoids from Amomum muricarpum

Abstract

A new natural diarylheptanoid, designated muricarpin, together with four diarylheptanoids were isolated from the rhizomes of Amomum muricarpum Elmer (Zingiberaceae) growing in Vietnam. Three known compounds, 1,7-bis(3,4-dihydroxyphenyl)heptan-3-yl acetate, 1-(4′-hydroxyphenyl)-7- (3″,4″-dihydroxyphenyl)heptan-3-yl acetate and 1-(3′,4′-dihydroxyphenyl)-7-(4″-hydroxyphenyl)-heptan-3-one were isolated for the first time from the genus Amomum, meanwhile (5R)-5-hydroxy-1,7-bis(4-hydroxyphenyl)-heptan-3-one was found for the first time in plants. Their structures were determined using spectroscopic analyses.

Keywords:

• Amomum muricarpum
• Zingiberaceae
• diarylheptanoid
• muricarpin

Acknowledgements

The authors are grateful to the National Foundation for Science and Technology Development (NAFOSTED, Hanoi, Vietnam) and Vietnam National University, Hanoi (Hanoi, Vietnam) for the support in this work.