1. Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt, Institute of Oceanography, National Taiwan University, Taipei 112, Taiwan, and Department of Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan