a
Division of Materials Science, 50 Nanyang Avenue, Nanyang Technological University, Singapore
b
Allan H. Conney Laboratory for Anticancer Research, Guang Dong University of Technology, Guang Dong, China
c
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore
E-mail: chmzh@nus.edu.sg
;
Fax: +65-6779-1691
;
Tel: +65-6516-2683