1. Department
of Biological Science and Technology, Institute
of Molecular Medicine and Bioengineering, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu 300, Taiwan
2. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100 Shih-Chuan first
Road, Kaohsiung 807, Taiwan
3. Institute of Chemistry, Academia Sinica, 128 Academia Road Sec.
2, Nankang, Taipei 115, Taiwan
4. Department of Chemistry, National Tsing Hua University, 101 Kuang-Fu Road Sec. 2, Hsinchu 300,
Taiwan