1. Division of Medicinal Chemistry & Pharmacognosy; College of Pharmacy; The Ohio State University, Room 336, Parks Hall; 500 West 12th Ave. Columbus OH 43210 USA
2. Pharmaceutical Chemistry Department; Faculty of Pharmacy; Ain Shams University; POB 11566, Abbassia Cairo Egypt
3. Institute of Biological Chemistry; Academia Sinica; 128 Academia Road Sec. 2, Nankang Taipei Taiwan