主题词：Synthesis and biological activity; Synthesis and Characterization of Heterocyclic Compounds; Multicomponent Synthesis of Heterocycles; Synthesis and Biological Evaluation; Chemical Synthesis and Reactions; Synthesis and Reactions of Organic Compounds; Synthesis of Organic Compounds; Synthesis of heterocyclic compounds; Inorganic and Organometallic Chemistry; Microwave-Assisted Synthesis and Applications; Chemical Synthesis and Analysis; Phytochemistry and Biological Activities; Quinazolinone synthesis and applications; Natural product bioactivities and synthesis; Phenothiazines and Benzothiazines Synthesis and Activities; Synthesis and Reactivity of Sulfur-Containing Compounds; Synthetic Organic Chemistry Methods; Chemical Reaction Mechanisms; Analytical Chemistry and Chromatography; Oxidative Organic Chemistry Reactions; Organic Chemistry Cycloaddition Reactions; Structural and Chemical Analysis of Organic and Inorganic Compounds; Sulfur-Based Synthesis Techniques; Click Chemistry and Applications; Carbohydrate Chemistry and Synthesis