[1] Nnamdi Azikiwe Univ, Dept Pharmaceut Microbiol & Biotechnol, Fac Pharmaceut Sci, PMB 5025, Awka, Anambra State, Nigeria
[2] Nnamdi Azikiwe Univ, Dept Pharmaceut & Med Chem, Fac Pharmaceut Sci, PMB 5025, Awka, Anambra State, Nigeria
[3] Heinrich Heine Univ, Inst Pharmaceut Biol & Biotechnol, D-40225 Dusseldorf, Germany