1. Institute of Marine Biochemistry; Vietnam Academy of Science and Technology (VAST); 18 Hoang Quoc Viet Caugiay Hanoi Vietnam
2. College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences; Yonsei University; Incheon 406-840 Korea
3. Institute of Chemistry; Vietnam Academy of Science and Technology (VAST); 18 Hoang Quoc Viet Caugiay Hanoi Vietnam
4. Hue University of Medicine and Pharmacy; Hue Vietnam
5. College of Pharmacy; Chungnam National University; Daejeon 305-764 South Korea