Note: A New Flavone from Hypericum Wightianum

Abstract

A new flavone, wightianin (1), along with five known compounds, n-triacontanol (2), betulinic acid (3), oleanolic acid (4), 3,4-O-isopropylidene-shikimic acid (5), and isoquercitrin (6), were isolated from the whole plants of Hypericum wightianum Wall ex Wight et Arn. Their structures were elucidated on the basis of spectral data, including 2D NMR techniques.

Keywords:

• Hypericum wightianum
• Wightianin
• Flavone

Acknowledgements

We thank H.Y. Qi, J. Liang and Y. Zhou for recording the NMR, UV and ESIMS spectra. Thanks are also due to J.L. Zhao and Z. F. Wang (Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences) for recording the IR spectra and to X.P. Yang (Key Laboratory of Applied Organic Chemistry, Lanzhou University) for recording the HR-ESIMS spectra.