a
Department of Applied Chemistry, National University of Kaohsiung, 700 Kaohsiung University Road, Kaohsiung 811, Taiwan
E-mail: jcarey@nuk.edu.tw
;
Fax: +886-7-591-9348
;
Tel: +886-7-591-9778
b
Department of Chemistry, Oklahoma City University, Oklahoma City, USA
c
College of Pharmacy, Chosun University, Gwangju 501-759, Republic of Korea
E-mail: wlee@chosun.ac.kr
;
Fax: +82-62-222-5414
;
Tel: +82-62-230-6376