Synthesis and Biological Activity of New Heterocyclic Compounds Derived from Vanillin, Acetone and Thiosemicarbazide - Al-Aqel, Amjad Abdulbaqi; Nayef, Mohammed Fahd; Mohammed, Moataz Sadiq; Mohammed, Ayman Adel; Hammoud, Amr Khaled; Ahmed, Mursel Ali (University of Science and Technology, Sana’a, 2026)