1. Hanoi University of Science and Technology Institute for R&D of Natural Products 1, Dai Co Viet 10999 Hanoi Vietnam
2. Vietnam Academy of Science and Technology Institute of Environmental Technology 18 Hoang Quoc Viet 10000 Hanoi Vietnam
3. University of Science and Technology of Hanoi 18 Hoang Quoc Viet 10000 Hanoi Vietnam