[1] Assiut Univ, Fac Pharm, Dept Pharmaceut Analyt Chem, Assiut 71526, Egypt
[2] Port Said Univ, Fac Pharm, Pharmaceut Analyt Chem Dept, Port Said 42526, Egypt
[3] Teschn Univ Braunschweig, Inst Med & Pharmaceut Chem, D-38106 Braunschweig, Germany
[4] Univ Nizwa, Nat & Med Sci Res Ctr, Birkat Al Mauz,POB 33, Nizwa 616, Oman
[5] Al Azhar Univ, Fac Pharm, Pharmaceut Analyt Chem Dept, Assiut Branch, Assiut 71524, Egypt