[1] Inst Med Res & Med Plants Studies, Ctr Res Med Plants & Tradit Med, Yaounde, Cameroon
[2] Univ Milan, Dept Pharmacol & Biomol, Lab Pharmacognosy, Sci, Milan, Italy
[3] Univ Dschang, Fac Sci, Dept Biochem, Dschang, Cameroon
[4] Univ Wolverhampton, Fac Sci & Technol, Sch Sci, Dept Biol Chem & Forens Sci, Wolverhampton, England