a
State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai, P. R. China
E-mail: chyang@mail.shcnc.ac.cn
;
Fax: +86-21-50806770
;
Tel: +86-21-50806770
b
College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China