1. Microanalysis Laboratory, Applied Organic Chemistry Department; National Research Centre (NRC); El Bohouth st. Dokki, 12622 Giza Egypt. Tel: 002-01129216152
2. Department of Analytical Chemistry; Faculty of Pharmacy Helwan University; 11795 Cairo Egypt.
3. Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical and Drug Industries Research Division; National Research Centre (NRC); Dokki 12622 Giza Egypt.