1. Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), 18-Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
2. Department of Basis Chemistry, University of Transport and Communications, Hanoi, Vietnam
3. Vrije Universiteit Brussel, Laarbeeklaan, 103 B-1090 Brussels, Belgium
4. Faculty of Chemistry, HanoiUniversity of Natural Science, 19 Le Thanh Tong, Hanoi
5. Institue of Chemistry, VAST, 18-Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
6. Analytical Chemistry, Drug Analysis and Pharmacognosy Unit, Université Catholique de Louvain, Avenue E. Mounier, 72 B-1200 Brussels, Belgium