主题词：Synthesis and biological activity; Synthesis and Biological Evaluation; Computational Drug Discovery Methods; Synthesis and Characterization of Heterocyclic Compounds; Click Chemistry and Applications; Multicomponent Synthesis of Heterocycles; Quinazolinone synthesis and applications; Bioactive Compounds and Antitumor Agents; Cancer therapeutics and mechanisms; Phenothiazines and Benzothiazines Synthesis and Activities; Cholinesterase and Neurodegenerative Diseases; Natural product bioactivities and synthesis; HIV/AIDS drug development and treatment; Synthesis of Organic Compounds; Metal complexes synthesis and properties; Synthesis of heterocyclic compounds; Natural Antidiabetic Agents Studies; Free Radicals and Antioxidants; Phytochemicals and Antioxidant Activities; Inflammatory mediators and NSAID effects; Chemical Synthesis and Analysis; Phytochemistry and Biological Activities; Receptor Mechanisms and Signaling; Enzyme function and inhibition; Biochemical and Molecular Research