... MM El-Kerdawy, AA El-Emam* and HI El-Subbagh Department of Medicinal Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura, Egypt E. Abushanab Department of Medicinal Chemistry, College of ... Heterocyclic Chem., 26, 913 (1989 ... 3] M. Elkouni, J. Niedzwicki, K ...