1. Department of Cosmetic Science, Chung Hwa College of Medical Technology, Tainan 717, Taiwan, Republic of China, Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan, Republic of China, National Research Institute of Chinese Medicine, Taipei 112, Taiwan, Republic of China, and Natural Products Laboratory, School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599