Two novel thiophenes from Echinops grijissi Hance

Abstract

Two novel thiophenes, grijisyne A (1), and grijisone A (2), were isolated from the crude ethanolic extract of the roots of Echinops grijissi Hance. Their structures were determined by spectral methods, especially 2D NMR spectra. All the isolated compounds were tested for their anti-tumor activities against three human tumor cell lines, HL-60, K562, and MCF-7.

Keywords:

• Echinops grijissi Hance
• grijisyne A
• grijisone A
• thiophenes
• cytotoxicity

Acknowledgements

The authors express their gratitude to Mr Chen, Department of Chemistry, for the NMR measurements. The research was supported by Program for New Century Excellent Talents in University (NCET-06-0515).