1. Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
2. Institute of Genome Research, VAST, 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
3. Institute of Marine Biochemistry, VAST, 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
4. College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon 406–840, Korea