Two new triterpenoid saponins from the underground parts of Weigela x “Bristol Ruby”

Abstract

Two new triterpenoid saponins, 3-O-β-D-xylopyranosyl-(1→4)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-β-D-arabinopyranosyloleanolic acid (1) and 3-O-β-D-xylopyranosyl-(1→4)-[α-L-arabinopyranosyl-(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranosyloleanolic acid (2), were isolated and elucidated from the underground parts of Weigela x “Bristol Ruby”. Their structures were established by interpretation of spectroscopic data (1 D and 2 D NMR) and mass spectrometry (MS).

Graphical Abstract

Keywords:

• Weigela x “Bristol Ruby”
• Caprifoliaceae
• triterpenoid saponin
• underground parts
• spectroscopic analysis

Acknowledgements

The authors would like to thank the Laboratoire de Pharmacognosie, Université de Bourgogne Franche-Comté, Dijon, France, for their support for carrying out the phytochemical work in this study. The authors would also like to thank the Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan, for their measurements of the spectroscopic data in this study.

Disclosure statement

No potential conflict of interest was reported by the author.