Two new isoflavone triglycosides from the small branches of Sophora japonica

Abstract

Two new isoflavone triglycosides, genistein 4′-O-(6″-O-α-l-rhamnopyranosyl)-β-sophoroside (1), and genistein 4′-O-(6‴-O-α-l-rhamnopyranosyl)-β-sophoroside (2), together with five known compounds, namely, sophorabioside, genistin, rutin, quercetin 3-O-β-d-glucopyranoside, and kaempferol 3-O-β-d-glucopyranoside, were isolated from the small branches of Sophora japonica L. Their structures were elucidated on the basis of spectroscopic analyses and chemical evidence.

Keywords:

• Sophora japonica
• Leguminosae
• Branch
• Isoflavone
• Genistein
• Triglycoside

Acknowledgements

The NMR and FAB-MS spectra were provided by Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. We are also pleased to thank Prof. Luoshan Xu (Division of Pharmacognosy, China Pharmaceutical University) for the plant identification.