1. Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Al-Azhar University, Assiut branch; Assiut 71524 Egypt
2. Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
3. Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Assiut University; Assiut 71526 Egypt
4. Faculty of Pharmaceutical Sciences; Nagasaki International University; 2825-7 Huis Ten Bosch Sasebo, Nagasaki 859-3298 Japan