1. Organic Chemistry Department Peoples' Friendship University of Russia (RUDN University) 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
2. Institute of Chemistry Graduate University of Science and Technology Vietnam Academy of Science and Technology N. 18, Hoang Quoc Viet street, Can Giay Hanoi 100 000 Vietnam
3. Faculty of Chemistry VNU University of Science N. 19, Le Tong street Hanoi 100 000 Vietnam