Affiliation: | 1. Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Science, Shandong University, Jinan 250012, PR China;2. Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States;3. Department of Biochemistry, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-0841, Japan;4. Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan |