Nief, O. A., Alzahawy, H. M. G., Abdallah, E. K., & Attia, A. M. (2018). Synthesis and identification of Five Membered Rings Heterocyclic Compounds Derived from Trimethoprim. Al-Nahrain Journal of Science, 1, 1-7. https://anjs.edu.iq/index.php/anjs/article/view/2007