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Abstracts

Two new triterpenoid saponins from the flowers and buds of Lonicera japonica

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Pages 925-929 | Received 21 Nov 2007, Accepted 12 May 2008, Published online: 11 Nov 2008
 

Abstract

Two new triterpenoid saponins, loniceroside D (1) and loniceroside E (2), were isolated from the dry flowers and buds of Lonicera japonica Thunb., along with seven known compounds, chlorogenic acid (3), sweroside (4), vogeloside (5), epi-vogeloside (6), loniceroside A (7), loniceroside B (8), and loniceroside C (9). Their structures were elucidated on the basis of spectroscopic data, physicochemical properties, and acid hydrolysis.

Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 30672601). NMR spectra were measured by Institute of Materia Medica, Chinese Academy of Medical Sciences; Mass spectra were operated at the Center of Chemical Institution of Chinese Academy of Sciences and Academy of Military Medical sciences.

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