1. Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Republic of China, Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt, National Museum of Marine Biology and Aquarium, Checheng, Pingtung 944, Taiwan, Republic of China, and Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan, Republic of China