Hussein, Khlood Abdulla Ahmed, and Yacoob Abdulla Kassium. 2021. “Synthesis and Characterization of Some New 2- and 6- Substituted of 5- Acetyl - 4- (P- Phenyl) Pyrimidine and Substituted Thieno [2, 3- D] Pyrimidine”. University of Aden Journal of Natural and Applied Sciences 25 (2):273-82. https://doi.org/10.47372/uajnas.2021.n2.a05.