A new picrotoxane sesquiterpene from the berries of Baccaurea ramiflora with antifungal activity against Colletotrichum gloeosporioides.

Nat Prod Res

a Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin 541006 , P.R. China.

Published: September 2015

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Three picrotoxane sesquiterpenes including one new glycoside and two known constituents, sapidolide A (2) and picrotoximaesin (3), were isolated from the berries of Baccaurea ramiflora. The structure of the new sesquiterpene glycoside, ramifloside (1), was elucidated as 2-one-6α-hydroxy-13-nor-11-picrotoxen-3(15β)-olide 10-O-β-D-glucopyranoside on the basis of extensive spectroscopic analysis. Compounds 1-3 exhibited antifungal activity against Colletotrichum gloeosporioides with MICs of 12.5, 12.5 and 50 μg/mL.

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http://dx.doi.org/10.1080/14786419.2014.999335DOI Listing

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