1. Natural
Product Research Institute, College of Pharmacy, Seoul National University, Sillim-dong,
Gwanak-gu, Seoul, 151−742, Korea
2. Department
of Biochemistry and Molecular Biology, School of Medicine, Shenzhen University, Shenzhen, 518060, China
3. Natural
Constituents Research Center, Korea Institute of Science and Technology (KIST), Gangneung, 25451, Korea