1. Graduate Institute of Natural
Products, College
of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
2. Department of Medicinal
and Applied Chemistry,
College of Life Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan
3. School of Pharmacy, College of Pharmacy, China Medical University, Taichung 404, Taiwan
4. Department of Pharmacognosy and Natural Products
Chemistry, Faculty of Pharmacy, Ain-Shams University, Organization
of African Unity Street, 11566 Abassia, Cairo, Egypt
5. Cancer Center, Kaohsiung Medical University Hospital, Kaohsiung, 807, Taiwan