Hussain, Faiq. “Synthesis of Assigned Structure of Cairomycin A, 6-Isopropyl-2,5-Diketopiperazine-3-Acetic Acid and Its Β-Lactam Analogue N`- (3-Methyl-1-Hydroxybutyr-2-Yl) Azetidin-2-One-4-Carboximide”. Science Journal of University of Zakho 7, no. 4 (December 30, 2019): 144-151. Accessed July 4, 2020. https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/638.