Design and synthesis of novel rigid dibenzo[b,f]azepines through ring closure technique as promising anticancer candidates against leukaemia and acting as selective topoisomerase I... oleh Mohammed Farrag El-Behairy, Walaa Hamada Abd-Allah, Mohamed M. Khalifa, Mohamed S. Nafie, Mohamed A. Saleh, Mohammed S. Abdel-Maksoud, Tarfah Al-Warhi, Wagdy M. Eldehna, Ahmed A. Al‐Karmalawy