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Abstract
Two new compounds, lysidicin D (1) and lysidicin E (2), were isolated from the roots of Lysidice rhodostegia. Their structures were elucidated by means of spectroscopic methods. Among them compound 1 showed potent anti-oxidant activity on in vitro.
Acknowledgements
The research project was supported by National Natural Science Foundations of China (No. 20672145), Beijing Natural Science Foundations (No. 7062046), ‘973’ Project (No. 2004CB518906) and PCSIRT (No.IRT0514). The authors are grateful to the Department of Instrumental Analysis, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College for the measuring the IR, UV, NMR, MS spectra and Tsinghua University for measurement of CD.
