Békro Yves-Alain1, Kouassi K. Christian1*, Sorokina E. Anatolievna2, Mamyrbékova-B. Akhanovna1,, 1UFR-SFA,Bioorganic Chemistry and Natural Substances Laboratory, NanguiAbrogoua University 02 BP 801 Abidjan 02, Côte d’Ivoire. 2Faculty of Physical, Mathematical and Natural Sciences, Department of Organic Chemistry, Organic Synthesis Laboratory, Peoples’ Friendship University of Russia, 6 Milklukho-Maklaya St., Moscow, Russia 117198., Russian Federation