1. Natural
Products Research Center, Korea Institute of Science and Technology (KIST), Gangneung, Gangwon-do 210-340, Republic of Korea
2. Department
of Marine Molecular Biotechnology, Gangneung-Wonju National University, Gangwon-do 210-702, Republic of Korea
3. Natural
Products Research Institute, College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea
4. College
of Pharmacy, Gachon University, Yeonsu-gu, Incheon 40-799, Republic of Korea
5. Gachon
Institute of Pharmaceutical Science, Gachon University, Yeonsu-gu, Incheon 406-799, Republic of Korea